I am aiming to picture the flow throughout this workspace. The air will come in from the top 120x120mm hole and flow into the upper smaller chamber. Then between the upper and lower chambers I would like to model a filter that has a static pressure of 200Pa. I would like to know how I am able to model such a filter in simscale. For example is there a way to select a cross section and state there is 200Pa pressure.
Here is a link to my project
Thank you, I’d appreciate any advice!
Hey Mike, thanks for making use of the Forum!
From a physics point of view, why would you want to directly specify the pressure drop across the filter? I don’t think I have seen such approach in the past (perhaps someone with more CFD experience can correct me).
If you just want to specify the pressure after the filter, you can cut your model there and use a Pressure Inlet condition, but then you would leave out the air box model.
Rather than this, the approach I would suggest is to use a Porous Media concept, which will locally compute the pressure drop as a function of the flow speed, just like a filter would do. This way you can have a more precise solution, and perhaps implement the filter pressure drop curve if you have it (otherwise you can approximate the pressure drop model).
Please refer to the following pages for more details on how to implement this approach:
Personally I am not 100% confident that a pressure drop is the way to go. It was just as I was looking at filters and fans, something I was told to watch out for was the rate the fan would push when the filter causes X amount of pressure drop (in this case 200Pa) so I thought that maybe I’d need to include that in the model. Thank you for the links. I saw a couple of these before but was not confident enough in myself to say that they were the right step to take. I’ll take a look at these resources and come back if I’m still lost haha
Feel free to ask questions, this is the purpose of the forum.
Perhaps @tsite or @ricardopg can add some suggestions here!