Types of mesh

Andrrrew · July 15, 2016, 10:42

Greetings,
Just out of curiosity, what kind of meshing models do you usually use? and why?

kirrer · July 15, 2016, 14:26

Polyhedral mesh in most cases (with thin mesher/embedded thin mesher/extruder as needed). Why? It's based on a tet mesh and is easy to automesh many different geometries with good accuracy. Also for the majority of simulations, having a hex mesh in the core is not crucial so I can live with the poly's lack of orthogonality (mostly liquid/solid simulations). If I was working with air simulations, and core motion/turbulence was important, I might stick to trimmed or directed mesh, depending on the geometry to be meshed.

lcarasik · July 17, 2016, 00:05

Quote:

Originally Posted by Andrrrew

Greetings,
Just out of curiosity, what kind of meshing models do you usually use? and why?

I primarily use the trimmer, prism layer, and extruder meshers. I find them to be the most intuitive and give me the most control over the mesh. Additionally, I personally find (again OPINION) the refinement regions to work better using the Trimmer mesher.

Also, I use the directed mesher when I can.

marmot · July 17, 2016, 02:43

Trimmer, prism layer, trying to get into parts based meshing,

Agree with electronics cooling, or CHT problems go with polyhedral, thin mesher most likely

But trimmer / polyhedral its like do you use oil or acrylic paints, they both create the painting,

The idea that polyhedral is better for flow that is not aligned to any coordinate because it is less diffusive than a trimmed mesh is for me marketing material but you can always find at least one case to back up marketing material.

July 15, 2016, 10:42	Types of mesh	#1
Andrrrew New Member Andrea Join Date: Jul 2016 Posts: 25 Rep Power: 9	Greetings, Just out of curiosity, what kind of meshing models do you usually use? and why?

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July 15, 2016, 14:26		#2
kirrer New Member Kevin Join Date: Oct 2012 Posts: 29 Rep Power: 13	Polyhedral mesh in most cases (with thin mesher/embedded thin mesher/extruder as needed). Why? It's based on a tet mesh and is easy to automesh many different geometries with good accuracy. Also for the majority of simulations, having a hex mesh in the core is not crucial so I can live with the poly's lack of orthogonality (mostly liquid/solid simulations). If I was working with air simulations, and core motion/turbulence was important, I might stick to trimmed or directed mesh, depending on the geometry to be meshed.

July 17, 2016, 02:43		#4
marmot Senior Member kevin alun Join Date: Sep 2011 Location: Germany Posts: 106 Rep Power: 14	Trimmer, prism layer, trying to get into parts based meshing, Agree with electronics cooling, or CHT problems go with polyhedral, thin mesher most likely But trimmer / polyhedral its like do you use oil or acrylic paints, they both create the painting, The idea that polyhedral is better for flow that is not aligned to any coordinate because it is less diffusive than a trimmed mesh is for me marketing material but you can always find at least one case to back up marketing material.