agglomeration multigrid in SU2 solver is algebraic multigrid?

ibopaul · March 9, 2021, 04:43

Hi, recently I had chance to use SU2 solver to calculate simple 2D airfoil.

since it was my first time to use SU2 code, I read tutorials.

and I found that there is agglomeration multigrid in calculation procedure.

This agglomeration multigrid is based on algebraic multigrid? or geometric multigrid? I tried to find what multigrid type is, but I couldn't find it.

Also, if it is algebraic multigrid method, is there any reference papers?

Thank you.

aero_amit · March 9, 2021, 09:39

I think it is agglomeration multigrid (coarser grid levels are produced).

Experts can correct me if I am wrong.

ibopaul · March 9, 2021, 11:26

Thank you for reply!

As far as I know, agglomeration multigrid method uses geometric data or algebraic data such as matrix coefficient when coarsening. Which coarsening type SU2's agglomeration multigrid method uses?

Thank you!

aero_amit · March 9, 2021, 11:43

Have a look at this discussion, Economon has explained some details

Problem with convergence

March 9, 2021, 04:43	agglomeration multigrid in SU2 solver is algebraic multigrid?	#1
ibopaul New Member ibopaul Join Date: Nov 2020 Posts: 12 Rep Power: 6	Hi, recently I had chance to use SU2 solver to calculate simple 2D airfoil. since it was my first time to use SU2 code, I read tutorials. and I found that there is agglomeration multigrid in calculation procedure. This agglomeration multigrid is based on algebraic multigrid? or geometric multigrid? I tried to find what multigrid type is, but I couldn't find it. Also, if it is algebraic multigrid method, is there any reference papers? Thank you.

March 9, 2021, 11:43		#4
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	Have a look at this discussion, Economon has explained some details Problem with convergence ibopaul likes this.

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March 9, 2021, 09:39		#2
aero_amit Member Amit Join Date: May 2013 Posts: 85 Rep Power: 13	I think it is agglomeration multigrid (coarser grid levels are produced). Experts can correct me if I am wrong.

March 9, 2021, 11:26		#3
ibopaul New Member ibopaul Join Date: Nov 2020 Posts: 12 Rep Power: 6	Thank you for reply! As far as I know, agglomeration multigrid method uses geometric data or algebraic data such as matrix coefficient when coarsening. Which coarsening type SU2's agglomeration multigrid method uses? Thank you!