|
[Sponsors] |
Compressible Fluid Flow in COMSOL Multiphysics |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
November 4, 2008, 01:59 |
Compressible Fluid Flow in COMSOL Multiphysics
|
#1 |
Guest
Posts: n/a
|
Hey all,
I am trying to figure out how to do compressible fluid flow with turbulence in COMSOL to determine the lift and drag coefficients for airfoils. I am able to do so for laminar incompressible flow, but of course these are not the correct results. So far, I have used the Chem Engineering - Non-Isothermal Flow and Convection and Conduction application modes. The Non-Isothermal Flow mode is using the k-e Turbulence Model. The non-default subdomain settings for the Non-Isothermal Flow are as follows: a) Dynamic Viscosity is 1.52*10^-5 kg/ms b) Initial Pressure is 23842 Pa c) Streamline diffusion off The non-default boundary settings for the Non-Isothermal Flow are as follows: a) An inlet, an outlet, and the rest are set to the default logarithmic function wall. b) Non-linear weak constraints are on For the Convection and Conduction: a) All sides are set to Thermal Insulator b) Thermal conductivity, density, heat capacity are set to certain values. c) Heat source is set to Q = p_time+u*px+v*py d) Temperature is initiated First off, when I try to solve it it returns with the error "Failed to find a solution: The relative residual (1.3e-006) is greater than the relative tolerance. Returned solution has not converged." What does that mean and how can I fix it? And finally, the temperature is constant around the cylinder/airfoil, however the temperature and velocity fields are not. Why is this? Shouldn't the temperature be changing? Thanks for any help you can provide! |
|
November 19, 2008, 15:05 |
Re: Compressible Fluid Flow in COMSOL Multiphysics
|
#2 |
Guest
Posts: n/a
|
I have the same error message. Did you found out? Does someone can help?
|
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
What are the best settings for a channel flow simulation? | Ashkan Kashani | CFX | 3 | October 13, 2022 22:36 |
Is recirculating flow is free vortex or forced vortex? | FluidKo | Main CFD Forum | 11 | July 21, 2022 07:21 |
mass flow in is not equal to mass flow out | saii | CFX | 12 | March 19, 2018 06:21 |
compressible flow calculation error using rhoSimpleFoam solver | student4326 | OpenFOAM Running, Solving & CFD | 7 | November 2, 2015 12:34 |
Compressible flow, no data at the outlet | mireis | FLUENT | 6 | September 3, 2015 03:10 |