Mesh interpolation

[mferm20]

Hello,

I would like to start a simulation for a finer mesh from a previous file run with a coarser mesh. I have followed nek5000 guide hoping it would work in nekRS. However, while the restart works fine for same mesh simulations, for different meshes it does not seem to advance from this point:

Checking restart options: airfoil0.f00005
nekuic (1) for ifld 1
nekuic (1) for ifld 2
nekuic (1) for ifld 3
Reading checkpoint data
FILE:airfoil0.f00005

This is what I added in my .par file:

[GENERAL]
polynomialOrder = 5
startFrom = "airfoil0.f00005" int
stopAt = endTime
endTime = 10
dt = 1e-05
#targetCFL = 1
timeStepper = tombo2

writeControl = simulationTime
writeInterval = 1

And in my .usr file:

subroutine userchk
include 'SIZE'
include 'TOTAL'

  if(istep.eq.0) call gfldr("airfoil0.f00005")


  return
  end

My question is it even posible to interpolate between different meshes? If so, how is it done?

Any help would be appreciated.

Thank you.

[yslan]

Try startFrom = "airfoil0.f00005+int" and see if that shows in the restart options like this
Checking restart options: airfoil0.f00005 int

If that is not the case, call gfldr in userchk as you already have should work.

No need to keep both of them. Otherwise, you will read the file twice.

[mferm20]

Thank you for your answer. That worked fine.