[求助]这样的边界条件该怎么设置？

ckpzyr

  请问大家，下面是一个通风柜模型这个模型就只知道出口流量大小那该怎么设置边界条件呢？
希望各位高手指点在下,谢谢了

newcfd

Normally, pressure is fixed at the exit. Since you do not have it, you can give a guess for pressure and run the code. If the total flux does not match the defined value, you can adjust the pressure value at the exit and rerun your code. Try a few times and then you will get close solution. I do not think you need very exact solution.

tedortide2

FLUENT 的 pressure outlet 边界条件里面不是有target mass flow rate 选项吗？ 在那里输入你的流量，可以吗？
不知道对否

ckpzyr

多谢大家的解答，to  newcfd  英语好厉害啊，是不是说在outlet设置压力出口就可以了，但intlet要怎么设置呢也设置压力进口么？
  

newcfd

[这个贴子最后由newcfd在 2007/09/26 00:13pm 第 1 次编辑]

If there is a setting for mass flow rate at outlet, you can use it. If your case is 2D, you need three fixed values at inlet because there are four equations and your case should be subsonic flow. Otherwise, you use four fixed values at inlet for 3D. You can choose what you have and convert them to the settings in fluent for inlet. Take a look at fluent manual. If you do not have energy equation, you reduce BCs by one at inlet.