Learning Forum

[Milhm]

hi.ni want to model a silencer in fluent.i do not have the geometry.I just have the pressure loss caused by silencer.how can i define it for fluent?n

[Karthik R]

Hello,nWhat is the end objective of your simulation? Are you attempting to model the flow inside the silencer? What is your parameter of interest in this simulation?nBtw, I moved your question to the 'Fluids' category for better alignment.nKarthikn

[Milhm]

i want to model flow in a pipe.along the pipe exist a silencer.i do not have the geometry of silencer.I just have the pressure loss caused by silencern

[YasserSelima]

The first step in CFD is to have a geometry and mesh.nWhat you can do is to design a geometry close to what you expect, and start meshing. Put the pressure boundaries you have, and check the mass flow. Adjust the geometry until you reach mass flow close to your case.nHint. use workbench and parameter ... this will make the job easiern

[Milhm]

i have the geometry of pipe.i just do not have geometry of silencer.but i know the pressure loss caused by silencer.is there any way to insert this pressure loss for fluent?n

[YasserSelima]

yesnuse a fan model, the fan model is disk where you can apply sharp pressure increase or velocity change. Try to apply it with -ve pressure increase.nn

[Milhm]

can i use porous media?nor a source term?n

[YasserSelima]

you can use porous media .. but it would be difficult to control the pressure drop. nYes, you can add source term to the momentum equation. You will need to calculate this source per cell. n

[YasserSelima]

I think the fan model is simpler. Just look at it in the manual. search for Fan Modeln

[Milhm]

how sholud i calculate inputs for porous media or source term?n

[Karthik R]

Hello,nYou don't need the porous media model here. I agree with . Please use the fan model.nKarthikn