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论中国古典诗学中的“圆美”——以书法文化为例
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作者 徐惠 《宜宾学院学报》 2020年第10期94-101,109,共9页
“圆美”是中国古典美学的一个重要范畴,具有丰富的哲学内涵。书法美学视域中的“圆美”一直没有引起足够的重视,仅作为美学与诗学领域阐释“圆美”时的举例和补充,未能获取独立的品格。然而,“圆美”的理念贯穿了书法的艺术语言、意象... “圆美”是中国古典美学的一个重要范畴,具有丰富的哲学内涵。书法美学视域中的“圆美”一直没有引起足够的重视,仅作为美学与诗学领域阐释“圆美”时的举例和补充,未能获取独立的品格。然而,“圆美”的理念贯穿了书法的艺术语言、意象世界和艺术意蕴等诸多层面,“圆美”也是历代书家孜孜以求的审美理想和历代书法审美风尚的关键要素。 展开更多
关键词 书法 形式 流动圆 意境
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EXPERIMENTAL INVESTIGATION ON FLOW AND HEAT TRANSFER CHARACTERISTICS IN TENON JOINT GAP BETWEEN TURBINE BLADE AND DISK 被引量:2
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作者 常海萍 黄太平 陈万兵 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 1995年第1期52-56,共5页
The now and heat transfer characteristics in tenon joint gap between turbine blade and disk have been investigated experimentally with a scale up model. The characteristics of flow and heat transfer in this speCial ga... The now and heat transfer characteristics in tenon joint gap between turbine blade and disk have been investigated experimentally with a scale up model. The characteristics of flow and heat transfer in this speCial gap passage have been analyzed. The results are useful for beat transfer analysis in turbine design. 展开更多
关键词 flow heat transfer non-circular tube transition multistate flow
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气固两相圆湍射流流动的大涡模拟 被引量:4
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作者 容易 张会强 王希麟 《清华大学学报(自然科学版)》 EI CAS CSCD 北大核心 2007年第2期240-243,共4页
针对气固圆湍射流流动采用基于双向耦合的大涡模拟方法进行了模拟,研究了直径为105μm的颗粒的存在对圆湍射流的影响。单相流动的预报结果在射流形态以及时均速度和湍流强度等统计结果方面均与实验结果符合良好。两相流动的时均速度和... 针对气固圆湍射流流动采用基于双向耦合的大涡模拟方法进行了模拟,研究了直径为105μm的颗粒的存在对圆湍射流的影响。单相流动的预报结果在射流形态以及时均速度和湍流强度等统计结果方面均与实验结果符合良好。两相流动的时均速度和湍流强度等统计结果与实验结果符合较好,与单相流动的模拟结果相比,105μm的颗粒加入流场后,由于其较快的响应特征起到了阻尼作用,从而降低了气相场的湍流强度。 展开更多
关键词 湍射流流动 大涡模拟 双向耦合 颗粒
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Three-dimensional numerical simulation of the flow past a circular cylinder based on LES method 被引量:1
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作者 陈海龙 戴绍士 +1 位作者 李佳 姚熊亮 《Journal of Marine Science and Application》 2009年第2期110-116,共7页
The hydrodynamic characteristics of a rigid, single, circular cylinder in a three dimensional, incompressible, uniform cross flow were calculated using the large-eddy simulation method of CFX5. Solutions to the three ... The hydrodynamic characteristics of a rigid, single, circular cylinder in a three dimensional, incompressible, uniform cross flow were calculated using the large-eddy simulation method of CFX5. Solutions to the three dimensional N-S equations were obtained by the finite volume method. The focus of this numerical simulation was to research the characteristics of pressure distribution (drag and litt forces) and vortex tubes at high Reynolds numbers. The results of the calculations showed that the forces at every section in the spanwise direction of the cylinder were symmetrical about the middle section and smaller than the forces calculated in two dimensional cases. Moreover, the flow around the cylinder obviously presents three dimensional characteristics. 展开更多
关键词 LES method three-dimensional flow past circular cylinder hydrodynamic characteristics
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Investigation of weld parameters on ductility, onion ring and fracture behaviour of friction stir welded AA2219-T87 被引量:2
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作者 Dinesh KUMAR R S MUTHUKUMARAN +2 位作者 Vincent XAVIER T VENKATESWARAN D SIVAKUMAR 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第9期2318-2327,共10页
Friction stir welding provides better retention of ductility and plasticity in comparison to fusion welding and it increases the stability against cracking.This study aims to enhance both the ductility and strength of... Friction stir welding provides better retention of ductility and plasticity in comparison to fusion welding and it increases the stability against cracking.This study aims to enhance both the ductility and strength of the welded joints.Tool profile was found to play an important role in retaining ductility,understanding the metal flow behavior and determining the fracture initiating point.The microstructure of different regions in the onion ring was inferred to correlate the strength with the metal flow pattern.The onion ring pattern strengthened the weld nugget.Shoulder and taper threaded profile tool resulted in superior mechanical properties.Microhardness results confirmed that the fracture runs through low hardness areas such as heat affected zone and thermo-mechanically affected zone.The scanning electron microscopic images revealed elongated grains and dimples,justifying ductile mode of fracture. 展开更多
关键词 plasticity metal flow onion ring fracture friction stir welding
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Simulation of Variable Viscosity and Jeffrey Fluid Model for Blood Flow Through a Tapered Artery with a Stenosis 被引量:5
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作者 Noreen Sher Akbar S.Nadeem 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第1期133-140,共8页
Non-Newtonian fluid model for blood flow through a tapered artery with a stenosis and variable viscosity by modeling blood as Jeffrey fluid has been studied in this paper. The Jeffrey fluid has two parameters, the rel... Non-Newtonian fluid model for blood flow through a tapered artery with a stenosis and variable viscosity by modeling blood as Jeffrey fluid has been studied in this paper. The Jeffrey fluid has two parameters, the relaxation time A1 and retardation time A2. The governing equations are simplified using the case of mild stenosis. Perturbation method is used to solve the resulting equations. The effects of non-Newtonian nature of blood on velocity profile, temperature profile, wall shear stress, shearing stress at the stenotsis throat and impedance of the artery are discussed. The results for Newtonian fluid are obtained as special case from this model. 展开更多
关键词 Jeffrey two constant fluid model blood flow tapered artery STENOSIS variable viscosity analyticalsolution
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Unsteady Numerical Simulation of Flow around 2-D Circular Cylinder for High Reynolds Numbers 被引量:7
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作者 Yanhui Ai Dakui Feng +1 位作者 Hengkui Ye Lin Li 《Journal of Marine Science and Application》 2013年第2期180-184,共5页
In this paper, 2-D computational analyses were conducted for unsteady high Reynolds number flows around a smooth circular cylinder in the supercritical and upper-transition flow regimes, i.e. 8.21×104〈Re〈1.54&#... In this paper, 2-D computational analyses were conducted for unsteady high Reynolds number flows around a smooth circular cylinder in the supercritical and upper-transition flow regimes, i.e. 8.21×104〈Re〈1.54×106. The calculations were performed by means of solving the 2-D Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations with a k-ε turbulence model. The calculated results, produced flow structure drag and lift coefficients, as well as Strouhal numbers. The findings were in good agreement with previous published data, which also supplied us with a good understanding of the flow across cylinders of different high Reynolds numbers. Meanwhile, an effective measure was presented to control the lift force on a cylinder, which points the way to decrease the vortex induced vibration of marine structure in future. 展开更多
关键词 circular cylinder vortex shedding high Reynolds number Strouhal numbers lift control measure marine structure unsteady numerical simulation
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Numerical Calculation of Supercavitating Flows over the Disk Cavitator of a Subsonic Underwater Projectile 被引量:3
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作者 Qingchang Meng Zhihong Zhang Jubin Liu 《Journal of Marine Science and Application》 CSCD 2015年第3期283-289,共7页
To deal with the effect of compressible fluids on the supercavitating flow over the subsonic disk cavitator of a projectile, a finite volume method is formulated based on the ideal compressible potential theory. By us... To deal with the effect of compressible fluids on the supercavitating flow over the subsonic disk cavitator of a projectile, a finite volume method is formulated based on the ideal compressible potential theory. By using the continuity equation and Tait state equation as well as Riabouchinsky closure model, an“inverse problem”solution is presented for the supercavitating flow. According to the impenetrable condition on the surface of supercavity, a new iterative method for the supercavity shape is designed to deal with the effect of compressibility on the supercavity shape, pressure drag coefficient and density field. By this method, the very low cavitation number can be computed. The calculated results agree well with the experimental data and empirical formula. At the subsonic condition, the fluid compressibility will make supercavity length and radius increase. The supercavity expands, but remains spheroid. The effect on the first 1/3 part of supercavity is not obvious. The drag coefficient of projectile increases as the cavitation number or Mach number increases. With Mach number increasing, the compressibility is more and more significant. The compressibility must be considered as far as the accurate calculation of supercavitating flow is concerned. 展开更多
关键词 underwater projectile subsonic projectile SUPERCAVITATION supercavitating flow finite volume method potential flow fluid mechanics disk cavitator
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Numerical Simulation of Unsteady-State Flowsin Bubble Column Reactors 被引量:1
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作者 张金利 包佳琨 +2 位作者 李韡 胡瑞杰 韩振亭 《Transactions of Tianjin University》 EI CAS 2003年第4期283-288,共6页
Unsteady-state operation has been widely applied in chemical engineering, such as optimizing a process, increasing yield and saving energy, etc. But the knowledge of the flow characteristics in bubble column reactors(... Unsteady-state operation has been widely applied in chemical engineering, such as optimizing a process, increasing yield and saving energy, etc. But the knowledge of the flow characteristics in bubble column reactors(BCRs) under unsteady state control is far from enough. In order to study the flow structures in this operation, the volume of fluid (VOF) model and the standard k-ε model to simulate the evolution of gas-liquid flow in BCRs under the start-up state are combined. For both the symmetry and asymmetry flow, the layout of the gas-inlets, the gas-in velocity, the liquid viscosity and the aspect ratio of the BCR all have effects on the liquid velocity distribution. The simulation results could provide some information for the design and scale-up of the BCRs. 展开更多
关键词 bubble column reactor numerical simulation gas-liquid flow flow structure
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Experimental Investigation of TARMAX Model for Modeling of Hydrodynamic Forces on Cylinder-like Structures 被引量:3
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作者 M. A. Lotfollahi Yaghin A. Mojtahedi +1 位作者 M. M. Ettefagh M. H. Aminfar 《Journal of Marine Science and Application》 2011年第3期281-288,共8页
A new approach that models lift and drag hydrodynamic force signals operating over cylindrical structures was developed and validated. This approach is based on stochastic auto regressive moving average with exogenous... A new approach that models lift and drag hydrodynamic force signals operating over cylindrical structures was developed and validated. This approach is based on stochastic auto regressive moving average with exogenous (ARMAX) input and its time-varying form, TARMAX. Model structure selection and parameter estimation were discussed while considering the validation stage. In this papel; the cylindrical structure was considered as a dynamic system with an incoming water wave and resulting forces as the input and outputs, respectively. The experimental data, used in this study, were collected from a full-scale rough vertical cylinder at the Delft Hydraulics Laboratory. The practicality of the proposed method and also its efficiency in structural modeling were demonstrated through applying two hydrodynamic force components. For this purpose, an ARMAX model is first used to capture the dynamics of the process, relating in-line forces provided by water waves; secondly, the TARMAX model was applied to modeling and analysis of the lift forces on the cylinder. The evaluation of the lift force by the TARMAX model shows the model is successful in modeling the force from the surface elevation. 展开更多
关键词 cylindrical piles wave force system identification parametric models
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Fluid Flow Past a Circular Cylinder with Tandem Rod and Staggered Rod at Low Reynolds Number 被引量:2
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作者 WU Wenbo WANG Jiasong 《Journal of Ocean University of China》 SCIE CAS CSCD 2018年第5期1053-1065,共13页
The flow past a primary cylinder with one tandem control rod and one staggered control rod is simulated in this paper through solving the Navier-Stokes equations. Two examples are simulated to validate the model, and ... The flow past a primary cylinder with one tandem control rod and one staggered control rod is simulated in this paper through solving the Navier-Stokes equations. Two examples are simulated to validate the model, and the results matched well with those of previous researches. The Reynolds number based on the diameter of the primary cylinder is 500. The diameter ratio between the control rod and the primary cylinder (d/D) is 0.25. It was found that the effect of the combination of one upstream tandem control rod and one staggered control rod on the hydrodynamics of the primary cylinder is a linear superposition of the effect of a corresponding single control rod, and the effect of the upstream tandem control rod is dominant at larger spacing ratios such as G/D=2. For the combination of a downstream tandem control rod and a staggered control rod, the effect of the control rods is different from that of the corresponding single control rod in the region of 0.2〈G/D〈0.5 & 30°〈a〈120° and 0.9〈G/D〈1.4 & 30°〈a〈50°, where the additional effect is obvious. In this case, the effect of the downstream tandem control rod is dominant at small spacing ratios (such as G/D=0.1). At moderate spacing ratios such as G/D=0.4, the effects of the tandem control rod and the staggered control rod are comparable in both cases. 展开更多
关键词 tandem and staggered control rods additional effect of double control rods vortex shedding drag and lift coefficients numerical simulation
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Flow of a Jeffery-Six Constant Fluid Between Coaxial Cylinders with Heat Transfer Analysis 被引量:1
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作者 Muhammad Yousaf Malik Azad Hussain Sohail Nadeem 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第8期345-351,共7页
In the present investigation we have discussed the flow of a Jeffrey-six constant incompressible fluid between two infinite coaxial cylinders in the presence of heat transfer analysis. The governing equations of Jeffr... In the present investigation we have discussed the flow of a Jeffrey-six constant incompressible fluid between two infinite coaxial cylinders in the presence of heat transfer analysis. The governing equations of Jeffrey-six constant fluid along with energy equation have been derived in cylindrical coordinates. The highly nonlinear equations are simplified with the help of non-dimensional parameters and then solved analytically with the help of homotopy analysis method (HAM) for two fundamental flows namely Couette and Generalized Couette flow. The effects of emerging parameters are discussed through graphs. The convergence of the HAM solution has been discussed by plotting h-curves. 展开更多
关键词 Jeffery-six constant fluid coaxial cylinders heat transfer analysis HAM solutions
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Flow property of AA2B06 sheet using overlapping elliptical bulge test 被引量:1
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作者 Yao WANG Tie-jun GAO Quan-da ZHANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第8期2179-2187,共9页
A novel experimental approach was presented, namely the overlapping elliptical bulge test, which can load and research thickness normal stress. Theoretical analysis model of the overlapping elliptical bulging was desc... A novel experimental approach was presented, namely the overlapping elliptical bulge test, which can load and research thickness normal stress. Theoretical analysis model of the overlapping elliptical bulging was described, the equivalent stress?strain curves of target sheets with different ellipticity ratios were determined experimentally, and influences of the material performance and thickness of overlapping sheets on the flow property of the target sheet were also researched. The results show that, in the overlapping hydraulic bulge test, the equivalent stress?strain curve can be determined up to larger strains before necking than in the no overlapping hydraulic bulge test. And as the die ellipticity ratio decreases, the flow stress curves tend to move away from the curve obtained by circular (b/a=1) bulging test. Meanwhile, the flow property of the target sheet can be improved by choosing higher strength coefficient K, larger work hardening exponent n and proper thickness of the overlapping sheet. 展开更多
关键词 flow property aluminum alloy overlapping sheet elliptical bulge thickness normal stress
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Hydrodynamic Behavior in a Rotating Zigzag Bed 被引量:4
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作者 李育敏 计建炳 +2 位作者 俞云良 徐之超 李肖华 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2010年第1期34-38,共5页
As a high gravity(HIGEE)unit,the rotating packed bed(RPB)uses centrifugal force to intensify mass transfer.Zigzag rotating bed(RZB)is a new type of HIGEE unit.The rotor of RZB consists of stationary discs and rotating... As a high gravity(HIGEE)unit,the rotating packed bed(RPB)uses centrifugal force to intensify mass transfer.Zigzag rotating bed(RZB)is a new type of HIGEE unit.The rotor of RZB consists of stationary discs and rotating discs,forming zigzag channels for liquid-gas flow and mass transfer.As in RPBs,some hydrodynamic behavior in RZB is interesting but no satisfactory explanation.In this study,the experiments were carried on in a RZB unit with a rotor of 600 mm in diameter using air-water system.The gas pressure drop and power consumption were measured with two types of rotating baffle for RZB rotors,one with perforations and another with shutter openings. The circumferential velocities of gas were measured with a five-hole Pitot probe.The pressure drop decreased rapidly when the liquid was introduced to the rotor,because the circumferential velocity of the liquid droplets was lower than that of the gas,reducing the circumferential velocity of gas and the centrifugal pressure drop.The power consumption decreased first when the gas entered the RZB rotor,because the gas with higher circumferential velocity facilitates the rotation of baffles. 展开更多
关键词 zigzag rotating bed rotating packed bed gas pressure drop power consumption
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Numerical Study on Heat Transfer and Flow Characteristics for Laminar Flow in a Circular Tube with Swirl Generators 被引量:2
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作者 Yongli Sun Guobin Wen +3 位作者 Xiaoming Xiao Bohua Ren Na Yang Luhong Zhang 《Transactions of Tianjin University》 EI CAS 2018年第3期244-255,共12页
This study investigated the heat transfer and flow characteristics of one kind of swirlgenerator in a circular heat exchanger tube through a numericalsimulation. The swirlflow induced by this type of swirlgenerator ca... This study investigated the heat transfer and flow characteristics of one kind of swirlgenerator in a circular heat exchanger tube through a numericalsimulation. The swirlflow induced by this type of swirlgenerator can obtain a high heat transfer rate with minimalpressure drop penalty. The simulations were carried out to understand the physicalbehavior of this kind of mesoscale heat enhancement component. By visualizing the heat transfer and flow characteristics, it is found that the swirlflow is induced by swirlgenerator in the circular tube couples with the impinging jet effect. After passing through the swirlgenerator, the localfriction factor of liquid can quickly return to lower levelmore quickly, while the localNusselt number maintains higher values for a distance; thus, the evaluation criterion of localperformance is improved. Single-factor optimization is used for three geometric parameters, i.e., the angle of swirlgenerator(25o, 45o, and 60o), the length of swirlgenerator(0.005, 0.01, and 0.02 m), and the center rod radius(1, 2, and 3 mm). The optimum parameters of the swirlgenerator for laminar flow of air in a circular tube are obtained, which should be 60o, 0.005 m, and 3 mm, respectively. 展开更多
关键词 Swirl generator Local spatial-temporal characteristic Swirling flow Impinging jet effect
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Effect of Mass Ratio on Hydrodynamic Response of a Flexible Cylinder
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作者 Haoyang Cen Rupp Carriveau David S-K Ting 《Journal of Marine Science and Application》 CSCD 2016年第1期50-62,共13页
The effect of the mass ratio on the flow-induced vibration (FIV) of a flexible circular cylinder is experimentally investigated in a towing tank. A Tygon tube with outer and inner diameters of 7.9 mm and 4.8 mm, res... The effect of the mass ratio on the flow-induced vibration (FIV) of a flexible circular cylinder is experimentally investigated in a towing tank. A Tygon tube with outer and inner diameters of 7.9 mm and 4.8 mm, respectively, was employed for the study. The tube was connected to a carriage and towed from rest to a steady speed up to 1.6 m/s before slowing down to rest again over a distance of 1.6 m in still water. Reynolds number based on the cylinder's outer diameter was 800-13,000, and the reduced velocity (velocity normalized by the cylinder's natural frequency and outer diameter) spanned from 2 to 25. When connected, the cylinder was elongated from 420 mm to 460 mm under an axial pre-tension of 11 N. Based on the cylinder's elongated length, the aspect ratio (ratio of the cylinder's length to outer diameter) was calculated as 58. Three mass ratios (ratio of the cylinder's structural mass to displaced fluid mass, m*) of 0.7, 1.0, and 3.4 were determined by filling the cylinder's interior with air, water, and alloy powder (nickel-chromium-boron matrix alloy), respectively. An optical method was adopted for response measurements. Multi-frequency vibrations were observed in both in-line (IL) and cross-flow (CF) responses; at high Reynolds number, vibration modes up to the 3rd one were identified in the CF response. The mode transition was found to occur at a lower reduced velocity for the highest tested mass ratio. The vibration amplitude and frequency were quantified and expressed with respect to the reduced velocity. A significant reduced vibration amplitude was found in the IL response with increasing mass ratios, and only initial and upper branches existed in the IL and CF response amplitudes. The normalized response frequencies were revealed to linearly increase with respect to the reduced velocity, and slopes for linear relations were found to be identical for the three cases tested. 展开更多
关键词 flow-induced vibration low mass ratio flexible cylinder multi-frequency response hydrodynamic response
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Numerical Simulation of Viscoelastic Extrudate Swell Through Elliptical Ring Die 被引量:4
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作者 许星明 赵国群 +1 位作者 秦升学 王威 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第1期10-17,共8页
The numerical simulation of extrudate swell is significant in extrusion processing.Precise prediction of extrudate swell is propitious to the control of melt flow and the quality of final products.A mathematical model... The numerical simulation of extrudate swell is significant in extrusion processing.Precise prediction of extrudate swell is propitious to the control of melt flow and the quality of final products.A mathematical model of three-dimensional(3D)viscoelastic flow through elliptical ring die for polymer extrusion was investigated.The penalty function formulation of viscoelastic incompressible fluid was introduced to the finite element model to analyze 3D extrusion problem.The discrete elastic viscous split stress(DEVSS)and streamline-upwind PetrovGalerkin(SUPG)technology were used to obtain stable simulation results.Free surface was updated by updating the streamlines which needs less memory space.According to numerical simulation results,the effect of zero-shear viscosity and elongation parameter on extrudate swell was slight,but with the increase of volumetric flow rate and relax time the extrudate swell ratio increased markedly.Finally,the numerical simulation of extrudate swell flow for low-density polyethylene(LDPE)melts was investigated and the results agreed well with others’work.These conclusions provided quantitative basis for the forecasting extrudate swell ratio and the controlling of extrusion productivity shape. 展开更多
关键词 viscoelastic fluid extrudate swell finite element method polymer extrusion
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Theoretical investigation of micropolar fluid flow between two porous disks 被引量:6
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作者 P.Valipour S.E.Ghasemi M.Vatani 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2825-2832,共8页
The steady, laminar, incompressible and two dimensional micropolar flow between two porous disks was investigated using optimal homotopy asymptotic method(OHAM) and fourth order Runge–Kutta numerical method. Comparis... The steady, laminar, incompressible and two dimensional micropolar flow between two porous disks was investigated using optimal homotopy asymptotic method(OHAM) and fourth order Runge–Kutta numerical method. Comparison between OHAM and numerical method shows that OHAM is an exact and high efficient method for solving these kinds of problems. The results are presented to study the velocity and rotation profiles for different physical parameters such as Reynolds number, vortex viscosity parameter, spin gradient viscosity and microinertia density parameter. As an important outcome, the magnitude of the microrotation increases with an increase in the values of injection velocity while it decreases by increasing the values of suction velocity. 展开更多
关键词 theoretical investigation porous disks micropolar fluid flow optimal homotopy asymptotic method(OHAM) microrotation
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Numerical Investigation of Vortex-induced Vibrations for Flow past a Circular Cylinder
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作者 WANG Guoxing WANG Shuqing LI Huajun 《Journal of Ocean University of China》 SCIE CAS 2006年第2期174-180,共7页
The objective of the present investigation is to study the vortex-induced vibrations (VIV) for flow past a circular cylinder. The turbulent flow is simulated by using a 2-D standard k-ε model incorporating the fini... The objective of the present investigation is to study the vortex-induced vibrations (VIV) for flow past a circular cylinder. The turbulent flow is simulated by using a 2-D standard k-ε model incorporating the finite volume method (FVM) and the Semi-Implicit Method for the Pressure Linked Equations (SIMPLE) algorithm on non-orthogonal boundary-fitted collocated grids. The wall boundaries are approximated with wall functions. In the numerical cases, the turbulent wake patterns are studied by plotting the streamlines and the turbulent kinetic energy contours. The pressure distributions are investigated. Analyses of the vortex-induced force coefficients and the structural vibrations are carried out. The variations of the Strouhal number with the Reynolds number and of the vortex-induced force coefficients with the reduced velocity are obtained. The results show that this numerical approach is feasible and efficient in investigating the VIV problem for a circular cylinder. 展开更多
关键词 vortex-induced vibration standard k-ε model finite volume method wall functions
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Performance Investigation of 2D Lattice Boltzmann Simulation of Forces on a Circular Cylinder 被引量:2
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作者 陈同庆 张庆河 程亮 《Transactions of Tianjin University》 EI CAS 2010年第6期417-423,共7页
The lattice Boltzmann method (LBM) is employed to simulate the uniform flow past a circular cylinder. The performance of the two-dimensional LBM model on the prediction of force coefficients and vortex shedding freque... The lattice Boltzmann method (LBM) is employed to simulate the uniform flow past a circular cylinder. The performance of the two-dimensional LBM model on the prediction of force coefficients and vortex shedding frequency is investigated. The local grid refinement technique and second-order boundary condition for curved walls are applied in the calculations. It is found that the calculated vortex shedding frequency, drag coefficient and lift coefficient are consistent with experimental results at Reynolds nu... 展开更多
关键词 lattice Boltzmann method flow past a circular cylinder large eddy simulation grid refinement secondorder curved boundary treatment drag and lift coefficients
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