A better desired ventilation form is acquired by comparing the three efficiency values . on the basis of recently materials collected in the field at home and abroad , this paper adopts two - equation turbulence model by analysis and comparison , and sets up mathematical model to study three - dimentional indoor turbulent flow . control - volume method and power - law scheme is used to discrete these differential equations . according to semi - implicit method for pressure - linked equations ( simple algorithm ) , author writes a general program in c language for simulation of the velocity profile , temperature and pollution concentration distributions of indoor airflow , and the writing , the debugging and the running of the program . all are completed in microsoft visual c + + 6 . 0 environment 在收集国内外在这一领域内的大量资料的基础上，通过分析与比较，采用了k -双方程模型来研究室内气流的浓度分布，建立了描写稳态的三维紊流室内气流浓度分布的数学模型，采用控制容积法和幂函数分布方案来离散微分方程组，按压力藕合方程的半隐式法（ simple ）算法，用c语言编写了计算室内气流流场和温度场、浓度场的通用程序，并在microsoftvisualc + + 6 . 0环境下对程序进行编制、调试与运行，并对调试工作做了探讨与分析。
Fractal porous media can be simplified as a kind of binary mixture with different thermal conductivities . the calculated results show that heat transfer in fractal porous media is very complicated , the thermal coupling effect of matrix with pore structure is studied . when heat transfer in pore structure is neglected , the effective thermal conductivity for random sierpinski carpet is scaled up with the percent of matrix , which is described by the classic archie ' s law 本文首先采用有限容积法分析了分形多孔介质中的热传导过程，多孔介质可以视为二元混合介质，计算中发现分形结构中的导热规律非常复杂，基质与孔隙之间存在着很强的相互换热，当不考虑孔隙气体中的导热时，本文所构造的随机sierpinski地毯上导热系数与基质率(基质百分含量)大多呈指数关系，这与archie定律的结果是-致的。
A numerical method , based on single temperature sensor , constant heat flux assumed and arbitrary number future time steps , was employed to determine the heat flux during rapid cooling on high temperature surface with multiply immersed impinging water jets the finite volume discretization method and treatment of boundary condition were presented 摘要基于单点测温、常热流假设，任意未来时间步长的导热反问题算法求解浸没水射流冷却过程的热流密度；采用有限容积法离散方程，附加源项法处理边界条件。
