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对推断死亡时间的新探讨 被引量:3
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作者 阎立强 高野 +1 位作者 沈聪 尹红帅 《辽宁警专学报》 2008年第3期55-57,共3页
对死亡时间的推测,是法医学鉴定的重要内容之一,也是尸体检验后必须要解决的问题。这项研究的目的是建立一个能够巧妙地消除不同体质的尸体冷却速度不均衡一致对尸体死亡时间推断的影响的数学模型,用以比较准确地分析推断死亡时间。
关键词 死亡时间 牛顿冷却(加热)定律 数学模型
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磁性和非磁性纳米流体的热传优化问题(英文)
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作者 HUSSANAN Abid 陈志敏 《深圳大学学报(理工版)》 EI CAS CSCD 北大核心 2019年第4期411-418,共8页
考虑导电纳米流体在二维边界层上的定态流动,分析磁性(Fe2O3)和非磁性(Cu)纳米颗粒被用作基础流体的水中,流体的传热过程源于牛顿加热边界条件,流体的数学模型根据单项方法给出,该方法将纳米流体作为单一齐性流体.在某种精确解存在的特... 考虑导电纳米流体在二维边界层上的定态流动,分析磁性(Fe2O3)和非磁性(Cu)纳米颗粒被用作基础流体的水中,流体的传热过程源于牛顿加热边界条件,流体的数学模型根据单项方法给出,该方法将纳米流体作为单一齐性流体.在某种精确解存在的特殊条件下,通过使用合适的无量纲变换,使流体运动所满足的非线性偏微分方程组转化为常微分方程组,流体的精确解则借助Maple软件及Whittaker函数给出.研究发现,含有Cu的纳米流体比含有Fe2O3的纳米流体具有更高的热传率。 展开更多
关键词 黏性流体力学 纳米流体 单相模式 拉伸板片 Whittaker 函数 牛顿加热
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Variable mass and thermal properties in three-dimensional viscous flow: Application of Darcy law 被引量:2
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作者 Iffat JABEEN Muhammad FAROOQ Nazir A. MIR 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第5期1271-1282,共12页
This article concentrates on the properties of three-dimensional magneto-hydrodynamic flow of a viscous fluid saturated with Darcy porous medium deformed by a nonlinear variable thickened surface.Analysis of flow is d... This article concentrates on the properties of three-dimensional magneto-hydrodynamic flow of a viscous fluid saturated with Darcy porous medium deformed by a nonlinear variable thickened surface.Analysis of flow is disclosed in the neighborhood of stagnation point.Features of heat transport are characterized with Newtonian heating and variable thermal conductivity.Mass transport is carried out with first order chemical reaction and variable mass diffusivity.Resulting governing equations are transformed by implementation of appropriate transformations.Analytical convergent series solutions are computed via homotopic technique.Physical aspects of numerous parameters are discussed through graphical data.Drag force coefficient,Sherwood and Nusselt numbers are illustrated through graphs corresponding to various pertinent parameters.Graphical discussion reveals that conjugate and constructive chemical reaction parameters enhance the temperature and concentration distributions,respectively. 展开更多
关键词 Newtonian heating chemical reaction variable mass diffusivity Darcy law
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MHD three-dimensional flow of Jeffrey fluid with Newtonian heating 被引量:6
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作者 S.A.Shehzad T.Hayat +1 位作者 M.S.Alhuthali S.Asghar 《Journal of Central South University》 SCIE EI CAS 2014年第4期1428-1433,共6页
The magnetohydrodynamic(MHD) three-dimensional flow of Jeffrey fluid in the presence of Newtonian heating is investigated. Flow is caused by a bidirectional stretching surface. Series solutions are constructed for the... The magnetohydrodynamic(MHD) three-dimensional flow of Jeffrey fluid in the presence of Newtonian heating is investigated. Flow is caused by a bidirectional stretching surface. Series solutions are constructed for the velocity and temperature fields. Convergence of series solutions is ensured graphically and numerically. The variations of key parameters on the physical quantities are shown and discussed in detail. Constructed series solutions are compared with the existing solutions in the limiting case and an excellent agreement is noticed. Nusselt numbers are computed with and without magnetic fields. It is observed that the Nusselt number decreases in the presence of magnetic field. 展开更多
关键词 three-dimensional flow Jeffrey fluid Newtonian heating
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Mixed convection characteristics in lid-driven cavity containing heated triangular block 被引量:2
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作者 Krunal M.Gangawane B.Manikandan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2017年第10期1381-1394,共14页
This research work numerically analyzes 2D,steady state,mixed convective heat transfer for Newtonian fluids in lid driven square enclosure with centered triangular block(blockage—10%or 30%)maintained either at the ... This research work numerically analyzes 2D,steady state,mixed convective heat transfer for Newtonian fluids in lid driven square enclosure with centered triangular block(blockage—10%or 30%)maintained either at the constant wall temperature or constant heat flux thermal conditions.The fluid flow in the enclosure is initiated by top moving wall in+x-direction,while all other walls are stationary.The top and bottom walls are thermally insulated.In particular,the governing field equations are solved for range of governing parameters such as,Reynolds number(1–1000),Prandtl number(1–100),and Grashof number 展开更多
关键词 Mixed convection Lid-driven cavity Reynolds number Numerical study Grashof number
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