July 14, 2021 at 6:56 amDanielgkhSubscriber
does anyone have experience working with perforated wall boundary condition?
I have a model where air is flowing along a perforated plate in absoprtion muffler. The perforated plate has around 4000 holes which is not really feasible to mesh them. It is also not possible to use symmetry BC as the muffler consist of other component. I am interested in the pressure or vortex forming or noise level at the lip of the plate. Is it possible to do so?
From Ansys Fluent user guide, it says this boundary condition only works for velocity and temperature field. I am wondering, if it will really show up, when I plot a velocity or temperatue contour. As in, small passages of flow from one side of the plate to the other.
Thanks in advance.July 14, 2021 at 7:05 amDrAmineAnsys EmployeeTry in a small example to get familiar with that boundary: we are extending the perforated wall boundary.
July 14, 2021 at 8:24 amJuly 14, 2021 at 10:32 amRobAnsys EmployeeIt's covered here, https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v211/en/flu_ug/flu_ug_sec_bc_perforat.html I assume the other side of that wall isn't solid?
July 14, 2021 at 10:58 amDrAmineAnsys EmployeeIt is not a wall BC. It is a complete separate framework.
July 14, 2021 at 11:02 amDanielgkhSubscriber
no, the other side is fluid. The example is like a sandwich, fluid at both side, solid at the middle.
If the other side is solid, then the gas can only flow past the perforated plate, but not through it.
July 14, 2021 at 11:30 amDanielgkhSubscriberHi if so, where do one find it?
July 14, 2021 at 12:02 pmDrAmineAnsys EmployeeDouble Click on Boundary Conditions in the tree. They will appear where Operating Conditions Button is.
July 14, 2021 at 12:09 pmDanielgkhSubscriberThanks, I have found it. I didn't realize it just now.
July 14, 2021 at 3:53 pmDrAmineAnsys Employeeƒæìƒæî
July 7, 2022 at 1:11 pmalex.purvis.572Subscriber
Hi, I'm researching the effects of a porous wall in a transonic wind tunnel. I have a UDF from a previous study to model the porous wall as a mass flow outlet but I'd like to compare this to the inbuilt porous/perforated wall setting in fluent. I have the porous wall currently set, obviously, as a wall but when I try to change the setting to Perforated Wall in the Boundary Conditions settings as suggested by @DrAmine, the button appears greyed out. Can anyone suggest a reason for this? It's not the first problem I've had like this - I had a file that worked perfectly on my supervisor's computer but when opened in mine it kept resetting the properties of air and not giving me access to the dropdown box. Turned out to be a version issue but we use the same version now so I don't know how to implement the perforated wall. Please HelpViewing 10 reply threads
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