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求不稳定温度场的一种显式差分格式

ON A DIFFERENCE FORMULA TO SOLVE THE NO-STEADY FIELD OF TEMPERATURE

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【作者】 王润富

【Author】 Wang Run-fu(The East China Technical University of Water Resources)

【机构】 南京华东水利学院

【摘要】 <正> 一、平面不稳定温度场 基本方程 (?)=a▽~2T+(?),(1)其中θ表示物体的绝热温升。如混凝土的内热源强度用绝热温升θ表示为

【Abstract】 In this paper a difference formula was introduced, in which the derivative of the temperature function with respect to time t used second difference formula. It possesses the precision higher than the linear difference formula, i.e. the error of the second difference formula is O(△t~3) less than O(△t~2) of the lineal formula. The conditions of stableness and convergence of this formula is almost same with the linear formula.

  • 【文献出处】 数值计算与计算机应用 ,Journal of Numerical Methods and Computer Applications , 编辑部邮箱 ,1983年02期
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