Hi Amir, In regards to your questions:
1. I am not sure what you are referring to as residuals in the context of your case. Since you are using PyFR to perform an unsteady simulation of the Navier-Stokes equations (not for example a steady state RANS solution) then the concept of residual does not apply. Instead, what you want to do is run the unsteady simulation for a long enough period of time that a time-average of the forces and flowfield stops changing. If you can clarify what you are calling the residual that might be helpful. 2. This is a bit fiddly to do with Paraview. However, one pipeline that has worked for me sometimes (not always) in the past is: merge blocks -> clean to grid -> extract surface -> then clip just the surface of the blade out. Thanks, On Sunday, 24 May 2020 09:10:06 UTC-4, Amir Hossein Jafari Matin wrote: > > Dear Dr. Witherden, > > I am trying to simulate a low pressure turbine cascade like the T106c case > in your paper and I have couple of questions regarding to the results. > > 1. How should the residuals be evaluated? In my case the results seem > logical in ParaView but the residuals are too high (for instance the amount > of the residual of mass conservation Rho is about 1500-1800) even after a > long time of simulation. In my understanding the residuals in PyFR are > normalized with the time step( which is 5e-5 in my case), which means the > R.M.S residual is in order of about 0.1, am I right?. I have also changed > the controller option from PI to none and used a smaller time step but > there has been no difference in the residuals! > > > 2. How can I Plot the time and span average pressure distribution? > Actually I wanted to plot the time- and span average isentropic mach number > to evaluate the aerodynamics of the blade. In order to do this I used the > time average pressure (using the [soln-plugin-tavg] option), however I > was not able to extract the wall boundary(the blade) in Paraview. If it is > possible in Paraview, could you give me a tip, which filters I should use > to extract boundaries? > > I am attaching the config file used, in case you want to take a look at. > > > Much appreciated, > Amir Matin > -- You received this message because you are subscribed to the Google Groups "PyFR Mailing List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/pyfrmailinglist/93534afe-42c6-47ef-840d-5462eb44d13b%40googlegroups.com.
