blower with sliding mesh

October 27, 2003, 19:41

I am doing blower simulation with sliding mesh. The output residual seems not right ( -1 order of magnitude). The mesh is pretty coarse, about 100 circumferentially. After 6 cycles of spin, the residuals are still fluctuating about. Is that normal? Can someone give me a clue. Thanks in advance.

October 30, 2003, 00:37

For transient simulation, the output is NOT residual: it's rate of change in time. So probably your solution is OK.

November 5, 2003, 08:22

If it is 'rate of change'. You can still check residual levels by changing 'rate' switch in Analysis Control->Output Control->Monitor Numeric Behavoir to 'residual'. Then see whether is really wrong or not.

November 7, 2003, 01:13

Thank you all for advice. Very helpful.

October 27, 2003, 19:41	blower with sliding mesh	#1
guang ai Guest Posts: n/a	I am doing blower simulation with sliding mesh. The output residual seems not right ( -1 order of magnitude). The mesh is pretty coarse, about 100 circumferentially. After 6 cycles of spin, the residuals are still fluctuating about. Is that normal? Can someone give me a clue. Thanks in advance.

October 30, 2003, 00:37	Re: blower with sliding mesh	#2
John L Guest Posts: n/a	For transient simulation, the output is NOT residual: it's rate of change in time. So probably your solution is OK.

November 5, 2003, 08:22	Re: blower with sliding mesh	#3
carno Guest Posts: n/a	If it is 'rate of change'. You can still check residual levels by changing 'rate' switch in Analysis Control->Output Control->Monitor Numeric Behavoir to 'residual'. Then see whether is really wrong or not.

November 7, 2003, 01:13	Re: blower with sliding mesh	#4
guang ai Guest Posts: n/a	Thank you all for advice. Very helpful.

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