March 3, 2022 at 2:23 ambtingthewindSubscriber
Now I am doing a steady state simulation in Fluent with pressure based solver.
Velocity inlet (Velocity 10 m/s, Reynolds number 4000), pressure outlet, and other sides are periodic and symmerty.
Minimum orthogonoal 0.2.
RNG ke with enhanced wall treatment.
Pressure drop is defined as:
Static pressure of (the inlet - outlet).
My question is:
Why the pressure drop fluctates in a sinoidal pattern with in a range of 2 Pa, even the residuals of continuity and so on below 1e-5?
BEST REGARDSMarch 3, 2022 at 12:04 pmMurari IyengarAnsys EmployeeHi btingthewind This could happen due to a couple of reasons.
High mesh skewness/aspect ratio: Please look through Chapter 22: Improving the Mesh (ansys.com).
Incorrect model: Maybe K-e is not the correct model for your simulation. Try other turbulence models. Also, the Re is 4000 which indicates a mix of laminar and turbulent flow (I'm assuming you are doing internal flow). This could also be a reason for fluctuating residuals since the flow might not be steady.
March 3, 2022 at 12:07 pmRobAnsys EmployeePlease can you post some images? Depending on the pressure 2Pa could be near enough zero change or huge.
March 5, 2022 at 11:56 pmbtingthewindSubscriberMany thanks to you!!
March 5, 2022 at 11:57 pmbtingthewindSubscriberMany thanks to you!!
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