TAGGED: boundary-conditions, fluent, laminar-flow
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October 9, 2023 at 4:46 pm
Mohamed Obeid
SubscriberI'm trying to perform 2D analysis for a steady laminar incompressible flow through a horizontal channel with a height of H (m) and length of 2H. The boundary conditions is of the form:
$u=\frac{3}{2}U_{avg}\left(1-\frac{2y}{H}\right),v=0$ at $x=0$,
$\frac{\partial u}{\partial x}=0,\frac{\partial v}{\partial x}=0$ at $x=2H$,
with no-slip condition at the walls. Is it possible to implement these boundary conditions in Fluent? I think that UDF may help but I have no experience dealing with it. Thanks in advance, I will appreciate any help.
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October 10, 2023 at 3:00 pm
Rob
Forum ModeratorAlmost certainly, either with an Expression or DEFINE_PROFILE. The editor turned your equation into gibberish, please post an image.Â
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October 10, 2023 at 4:04 pm
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October 10, 2023 at 4:12 pm
Rob
Forum ModeratorOK, so u is the normal velocity, Uavg would be a fixed value, along with H? y is the y-coordinate?Â
I suspect this covers what you need think about  https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v232/en/flu_udf/flu_udf_DetailedExampleUDFs.html%23flu_udf_udf_bc_appl  but Expressions https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v232/en/flu_ug/flu_ug_expressions.html may be better for a new user. To access the links, open Help from Fluent and then copy the links into the browser that opens.Â
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October 10, 2023 at 5:54 pm
Mohamed Obeid
SubscriberThank you so much, that is exactly what I was looking for. Also, I didn't know about the help guid of Fluent. I really appreciate it.
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October 11, 2023 at 8:39 am
Rob
Forum ModeratorYou're welcome. You may also want to review the materials under Learning - book icon left side upper on here.Â
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- The topic ‘Variable inlet velocity implementation in ANSYS Fluent’ is closed to new replies.
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