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首页> 外文会议>2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana >THE BASIS FOR A CORRECTION FOR EXPONENTIAL DEPENDENCE OF VISCOSITY ON TEMPERATURE FOR NATURAL CONVECTION BY AN INTEGRAL METHOD
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THE BASIS FOR A CORRECTION FOR EXPONENTIAL DEPENDENCE OF VISCOSITY ON TEMPERATURE FOR NATURAL CONVECTION BY AN INTEGRAL METHOD

机译：积分法修正自然对流温度下粘度指数相关性的基础

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摘要

The Nusselt number for laminar natural convection is affected by the exponential dependence on inverse absolute temperature of the viscosity of some liquids, oil being a prime example. A common means of correcting for this effect is to multiply the correlation Nu = C Ra~(1/4) for constant properties by a factor (μ_∞μ_2w)~n to obtain Nu = C Ra~(1/4)(μ_∞μ_2w)~n. That there is a sound basis for the form of this corrective term is shown by employing an integral method to obtain approximate, closed-form solutions to the laminar boundary layer equations for the case of a vertical plate of specified temperature to such a liquid.
机译：层流自然对流的努塞尔数受某些液体粘度反绝对温度的指数依赖性影响，其中油是一个很好的例子。校正此影响的常用方法是将常数属性的相关Nu = C Ra〜（1/4）乘以系数（μ_∞μ_2w）〜n，以获得Nu = C Ra〜（1/4）（μ_ ∞μ_2w）〜n。对于指定温度的垂直板，对于此类液体，通过采用积分方法来获得层流边界层方程的近似，封闭形式的解，可以表明该校正术语的形式具有良好的基础。

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