I have used Realizable k-epsilon model and doing a problem related to external aerodynamics. I am looking for your suggestion in this regard.
Dear friend, it depends on the physical quantity you simulate and test. For complex quantities like optical response, heat flux, it is hard to say. A paper of mine is suggested for you, where a brief discussion is done. (
Method of Investigation for Numerical Simulation on Aero-Optical Effect Based on WCNS-E-5)
Its depends on the problem. Usually the uncertainty error can be below 10%. But u can reduce them by applying coding
I advise you to investigate the process with relatively small Reynolds numbers and gradually increase their value by an order of magnitude. Check the adequacy of the model using the experiment.
For some fields there is proposals as codes or standarda. For example for heat exchangers there is
ASME PTC 30-1991, ASME performance test codes - Code on air cooled heat exchangers, (1991).
It will be acceptable that the difference between the numerical results and experimental measurements are between 5 to 7 %. in condition of at least 7 to 15 points on graph for comparison.
- Badges
- Science topic