This email from kenneth.hinh@ucalgary.ca originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list to disable email stamping for this address.

 

Hello Nektar++ users and developers,

 

Regarding the compressible flow solver:

 

For solving the compressible NS equations in axisymmetric coordinates, in the Github there is the “NavierStokesCFEAxisym” solver and the Forcing type “AxiSymmetric”. I see that the forcing type is sometimes used with other solvers (for example in nectar/solvers/CompressibleFlowSolver/Tests/Nozzle_AxiSym_Swirl.xml where it’s used with EulerCFE), but in another case it is used in conjunction with NavierStokesCFEAxisym (in CompressibleFlowSolver/Tests/PipeFlow_NSAxisym.xml).  

  1. What is the suggested way to solve in axisymmetric coordinates? Is the Forcing supported with the implicit compressible flow solver in 3d?
  2. Are the variables u,v,w simply mapped to u_x, u_r, and u_theta when configuring the session file? (and to clarify is the axis of symmetry around x=0?)

 

Secondly, I am working with a simulation with a large DOF and am trying to reduce the size the checkpoint files. By default, 15 variables get saved for each checkpoint file. Is there any way of selecting which variables to print to reduce the checkpoint file size? For example, to not output redundant variables such as rhou, rhov and rhow.

 

Thank you for taking the time to read my questions, and please forgive me if answers to my questions can be found in the Archives or on the user documentation – I have tried my best to look.

 

Kindest regards,

Kenneth Hinh

 

Graduate Student

University of Calgary

Alberta, Canada