论文部分内容阅读
利用时域递归展开算法对墙体内热湿耦合传递方程进行求解。以木板为例,应用该算法进行了热湿耦合传递的分析计算,在时间域和空间域上分别运用递归展开法和控制容积法进行离散,从而得到递归形式的线性方程组,运用MATLAB软件对这一过程进行求解。计算结果与有限差分算法、解析解计算结果以及实验数据吻合良好,表明该算法能够用于求解多孔介质热湿耦合传递模型。时间步长的改变对计算结果影响较小,可通过增加时间步长方法来减少工作量。
The time-domain recursive expansion algorithm is used to solve the heat-moisture coupling transfer equation in the wall. Taking wood plank as an example, this algorithm is applied to the analysis and calculation of heat and moisture coupling transfer. The recursive expansion method and the volume control method are respectively used in the time domain and the spatial domain to discretize the linear equations. Recursive linear system of equations is obtained. Solve this process. The calculated results are in good agreement with the finite difference method, the analytical solution and the experimental data. It shows that the algorithm can be used to solve the heat and moisture coupling transfer model in porous media. The change of the time step has little effect on the calculation result, and the workload can be reduced by adding the time step method.