TWO-AND THREE-DIMENSIONAL NATURAL AND MIXED CONVECTION SIMULATION USING MODULAR ZONAL MODELS IN BUILINGS

摘要

We demonstrate the use of the zonal model approach, which is a simplified method for calculating natural and mixed convection in rooms. Zonal models use a coarse grid and use balance equations, state equations, hydrostatic pressure drop equations and power law equations of the form M = C△P~n. The advantages of the zonal approach and its modular implementation are discussed. The zonal model resolution of nonlinear equation systems is demonstrated for three cases: a 2-D room a 3-D room and a pair of 3-D rooms separated by a partition wit an opening. A sensitivity analysis with respect to physical parameters and grid coarseness is presented. Results are compared to computational fluid dynamics(CPD) calculations and experimental data.