Discussion Of Different Simulation Methods For The Assembly Room Of Xi'an Silian Ltd.

With the divelopment of scocity and national economy, air-conditioning systems faces high standards. In order to improve Indoor Air Quality,we must study air movement inside the building which is difficult to model in suitble proportion. Due to it 's efficiency and economy, the techenology of Computational Fluid Dynamics can solve this problem quite well.However,when facing complex cases , CFD software requires large memory and CPU time. For ordinary user who has no acess to expensive computer resource, efficient programming is of the most impotant.Here I use three different ways to solve a same case, an assembly room with underfloor air conditioning system. First, 'direct method'restablish the geometry, mesh it and read it into Fluent,get the results. Second, 'step by step method':first solve part of the case, the results of the first part is been written as user difined founctions ,then read these fouctions into the remain part of the case, solve the case. The last way is 'porous media method': Treat highly complex region with porous media, mesh the whole space enclosure and solve the case using FLUENT.'direct method' can give accordingly exact results, but is very time consuming; 'step by step method' needs little CPU time and can give high quality results to first part which is quite simple and easy to resolve,but fail to predict the air motion of whole room space . 'porous method' also needs little CPU time, and the results is quite same as those of the 'direct methond'. Compared the three ways we can found that ' porous method' is the most desirable way to predict complex air movement with cheap cost.