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DECAY OF VORTEX VELOCITY AND DIFFUSION OF TEMPERATURE IN A GENERALIZED SECOND GRADE FLUID
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作者 沈芳 谭文长 +1 位作者 赵耀华 T.增冈隆士 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2004年第10期1151-1159,共9页
The fractional calculus approach in the constitutive relationship model of viscoelastic fluid was introduced. The velocity and temperature fields of the vortex flow of a generalized second fluid with fractional deriva... The fractional calculus approach in the constitutive relationship model of viscoelastic fluid was introduced. The velocity and temperature fields of the vortex flow of a generalized second fluid with fractional derivative model were described by fractional partial differential equations. Exact analytical solutions of these differential equations were obtained by using the discrete Laplace transform of the sequential fractional derivatives and generalized Mittag-Leffler function. The influence of fractional coefficient on the decay of vortex velocity and diffusion of temperature was also analyzed. 展开更多
关键词 generalized second grade fluid fractional calculus unsteady flow temperature field generalized Mittag-Leffler function
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BIFURCATION OF FLOW AND MASS TRANSPORT IN A CURVED BLOOD VESSEL
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作者 谭文长 魏兰 +1 位作者 赵耀华 TAKASHI Masuoka 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2003年第4期315-319,共5页
A numerical analysis of flow and concentration fields of macromolecules in a slightly curved blood vessel was carried out. Based on these results, the effect of the bifurcation of a flow on the mass transport in a cur... A numerical analysis of flow and concentration fields of macromolecules in a slightly curved blood vessel was carried out. Based on these results, the effect of the bifurcation of a flow on the mass transport in a curved blood vessel was discussed. The macromolecules turned out to be easier to deposit in the inner part of the curved blood vessel near the critical Dean number. Once the Dean number is higher than the critical number, the bifurcation of the flow appears. This bifurcation can prevent macromolecules from concentrating in the inner part of the curved blood vessel. This result is helpful for understanding the possible correlations between the blood dynamics and atherosclerosis. 展开更多
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Studies on numerical site calibration over complex terrain for wind turbines 被引量:4
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作者 Daisuke MATSUSHITA Hikaru MATSUMIYA +2 位作者 Yoshinori HARA Satoshi WATANABE Akinori FURUKAWA 《Science China(Technological Sciences)》 SCIE EI CAS 2010年第1期8-12,共5页
The estimation of wind turbine performance over complex terrain is very difficult because of the document of standard IEC61400-12 is adapted for flat or slightly complex topography.And the cost of constructing a meteo... The estimation of wind turbine performance over complex terrain is very difficult because of the document of standard IEC61400-12 is adapted for flat or slightly complex topography.And the cost of constructing a meteorological mast is higher with scaling wind turbine up.We have proposed a numerical site calibration(NSC) technique in order to estimate the inflow velocity at the position of wind turbine by using CFD tool to calculate the flow field around the site.The present paper shows the problems for the procedure of NSC in which a commercial nonlinear CFD tool and the improvement method are used to gain a more accurate result.It is clarified that the wind turbine performance which is estimated by using the wind speed on the meteorological mast has a good result for annual energy production. 展开更多
关键词 WIND TURBINE SITE CALIBRATION complex TERRAIN WIND TURBINE performance
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