Artificial Dissipation Techniques

October 19, 2000, 05:56

I'm currently performing inviscid compressible flow calculations on unstructured meshes.

When using combined 2nd/4th order smoothing, may I know what are some ways to implement this on wall boundaries without generating spurious entropy?

Would also appreciate references to literature on this subject.

Thanks very much.

October 20, 2000, 02:11

Hi

In my knowledge, these artificial dissipation are not implemented at walls and other physical boundaries like inlet and outlet. I would suggest you to refer the 1981 paper by Jameson on this regard. I have forgot the jounal name.

Regards

Apurva

October 25, 2000, 10:02

AIAA Paper 81-1259 is the original paper where JST scheme producted. I suggeste you see Swanson and Turkel's paper or NASA report which you can download it from NASA report service. In those papers Swanson analysised the 4-order artificial dissipation at the wall boundary according to the flux and conservation .

October 19, 2000, 05:56	Artificial Dissipation Techniques	#1
Chan K I Guest Posts: n/a	I'm currently performing inviscid compressible flow calculations on unstructured meshes. When using combined 2nd/4th order smoothing, may I know what are some ways to implement this on wall boundaries without generating spurious entropy? Would also appreciate references to literature on this subject. Thanks very much.

October 20, 2000, 02:11	Re: Artificial Dissipation Techniques	#2
Apurva Shukla Guest Posts: n/a	Hi In my knowledge, these artificial dissipation are not implemented at walls and other physical boundaries like inlet and outlet. I would suggest you to refer the 1981 paper by Jameson on this regard. I have forgot the jounal name. Regards Apurva

October 25, 2000, 10:02	Re: Artificial Dissipation Techniques	#3
boling Guest Posts: n/a	AIAA Paper 81-1259 is the original paper where JST scheme producted. I suggeste you see Swanson and Turkel's paper or NASA report which you can download it from NASA report service. In those papers Swanson analysised the 4-order artificial dissipation at the wall boundary according to the flux and conservation .

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