topic Help with CFD Dust Collection flow sim in CFD Forum

Help with CFD Dust Collection flow sim

Simon.robertsX5M9D — Tue, 17 Jan 2023 00:07:38 GMT

Hi All

Need some help with a project am doing to check the flow (dust collection unit) has shown below.

I don’t know how to setup the CFD to show me the flow when sucking from the suction port from the main opening has shown below, my thoughts are it’s not very efficient because of the opening being so wide, so like to try narrow version too.

Have attached the IPT file

Thanks Simon

Re: Help with CFD Dust Collection flow sim

marwan_azzam — Tue, 17 Jan 2023 18:04:22 GMT

Hello Simon,

For starters, it seems your model is missing an air volume as shown below.

You can setup the model after adding that volume.

Re: Help with CFD Dust Collection flow sim

Simon.robertsX5M9D — Tue, 17 Jan 2023 19:45:25 GMT

Hi Marwan

thanks for the reply, how do i add air volume in the model, am a newbie to CFD

Re: Help with CFD Dust Collection flow sim

marwan_azzam — Tue, 17 Jan 2023 21:17:41 GMT

Hi Simon,

That volume cannot be generated in CFD. You need to create it in the CAD environment.

Marwan

Re: Help with CFD Dust Collection flow sim

Simon.robertsX5M9D — Tue, 17 Jan 2023 22:06:55 GMT

Thanks marwan

Is this the correct way to create the volume? have also attached the model

Re: Help with CFD Dust Collection flow sim

marwan_azzam — Tue, 17 Jan 2023 22:15:34 GMT

Yes, This geometry looks right.

Marwan

Re: Help with CFD Dust Collection flow sim

Simon.robertsX5M9D — Tue, 17 Jan 2023 22:33:43 GMT

Ok thanks

next question, i have set the boundaries etc , if am using flow, suction how do i sent up the boundaries please?

just tried with pressure sent has shown below

Re: Help with CFD Dust Collection flow sim

marwan_azzam — Wed, 18 Jan 2023 13:40:09 GMT

Hello Simon,

The way you have the BCs will not result in any flow. There is no pressure differential or anything else to drive the flow.

If you know the pressure drop you can apply that on the one end.

Otherwise you can apply a velocity or flow rate on one end and a P=0 on the other.

Marwan