Motion of cylinder due to vortex shedding

November 20, 2006, 11:43

Hi there,

anybody can help how to solve for the motion of a cylinder due to vortex shedding? I have solved the stationary cylinder and the vortices. However when the cylinder starts moving a differential equation has to be solved?

Any ideas? Regards

November 20, 2006, 12:16

You could use the 6DOF solver included in Fluent. Of course, reduced to only 1 degree of freedom: translation on vertical axis.

Razvan

November 23, 2006, 10:16

Does that involve the use of UDF?

Achilleas

November 24, 2006, 04:06

As I already mentioned, the 6DOF solver is included in the Fluent solver since 6.2 version. If you do not have a Fluent 6.2, then you will need the 6DOF solver in the UDF form to compile and include it in the older versions of Fluent. But be careful, the 6DOF solver ("dynamic mesh") does not appear in the menu unless you have first activated the unsteady solver!

Razvan

November 20, 2006, 11:43	Motion of cylinder due to vortex shedding	#1
ACHILLEAS TSOMPANOS Guest Posts: n/a	Hi there, anybody can help how to solve for the motion of a cylinder due to vortex shedding? I have solved the stationary cylinder and the vortices. However when the cylinder starts moving a differential equation has to be solved? Any ideas? Regards

November 20, 2006, 12:16	Re: Motion of cylinder due to vortex shedding	#2
Razvan Guest Posts: n/a	You could use the 6DOF solver included in Fluent. Of course, reduced to only 1 degree of freedom: translation on vertical axis. Razvan

November 23, 2006, 10:16	Re: Motion of cylinder due to vortex shedding	#3
ACHILLEAS TSOMPANOS Guest Posts: n/a	Does that involve the use of UDF? Achilleas

November 24, 2006, 04:06	Re: Motion of cylinder due to vortex shedding	#4
Razvan Guest Posts: n/a	As I already mentioned, the 6DOF solver is included in the Fluent solver since 6.2 version. If you do not have a Fluent 6.2, then you will need the 6DOF solver in the UDF form to compile and include it in the older versions of Fluent. But be careful, the 6DOF solver ("dynamic mesh") does not appear in the menu unless you have first activated the unsteady solver! Razvan

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