cell zone conditon->moving wall vs. dynamic mesh

soriyoshi · December 31, 2014, 22:01

Hey guys, I'm new to dynamic mesh and confused about cell zone conditon->moving wall and dynamic mesh. They both represent moving behavior but when do I use each of them?
Thanks and happy new year~

amin.z · January 1, 2015, 03:49

hey

I think in moving wall, fluent only changes the values of coordinate axes and frames! but in dynamic mesh the grids really move!
so in moving wall there isn't any change in mesh quantities and mesh deformation and mesh generation during running solution! but in dynamic mesh, solver experiences mesh deformation and generation!
and dynamic mesh should solves transient but moving wall usually used for steady problems!
finally moving wall problems are simpler and converge faster than dynamic mesh problems!

Correct me if I'm wrong!

soriyoshi · January 3, 2015, 00:05

Quote:

Originally Posted by amin.z

hey

I think in moving wall, fluent only changes the values of coordinate axes and frames! but in dynamic mesh the grids really move!
so in moving wall there isn't any change in mesh quantities and mesh deformation and mesh generation during running solution! but in dynamic mesh, solver experiences mesh deformation and generation!
and dynamic mesh should solves transient but moving wall usually used for steady problems!
finally moving wall problems are simpler and converge faster than dynamic mesh problems!

Correct me if I'm wrong!

After 2 days of studying on this, I totally agree with you~It's a very comprehensive summary. Thank you a looooott~!!

December 31, 2014, 22:01	cell zone conditon->moving wall vs. dynamic mesh	#1
soriyoshi New Member Zeng Liyue Join Date: Sep 2014 Posts: 21 Rep Power: 12	Hey guys, I'm new to dynamic mesh and confused about cell zone conditon->moving wall and dynamic mesh. They both represent moving behavior but when do I use each of them? Thanks and happy new year~

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January 1, 2015, 03:49		#2
amin.z Senior Member Amin Join Date: Oct 2013 Location: Germany Posts: 397 Rep Power: 15	hey I think in moving wall, fluent only changes the values of coordinate axes and frames! but in dynamic mesh the grids really move! so in moving wall there isn't any change in mesh quantities and mesh deformation and mesh generation during running solution! but in dynamic mesh, solver experiences mesh deformation and generation! and dynamic mesh should solves transient but moving wall usually used for steady problems! finally moving wall problems are simpler and converge faster than dynamic mesh problems! Correct me if I'm wrong!