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VIV; Relation between CL and stiffness of the cylinder. |
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October 5, 2015, 08:22 |
VIV; Relation between CL and stiffness of the cylinder.
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#1 |
New Member
Join Date: Sep 2015
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Hello!
I am doing a VIV investigation on a square cylinder in ANSYS Fluent and Im trying to replicate the results from this article; http://scitation.aip.org/content/aip...1063/1.4792351 But so far without any luck. A recent test showed that the lift coefficient changed with changed stiffness of the cylinder which feels strange? My UDF looks like follows: #include "udf.h" DEFINE_SDOF_PROPERTIES(sdof_props,prop,dt,time,dti me) { real cg; real k = 118.435; cg = DT_CG(dt)[1]; prop[SDOF_MASS] = 3; prop[SDOF_LOAD_F_Y] = -k*cg; prop[SDOF_ZERO_TRANS_X] = TRUE; prop[SDOF_ZERO_ROT_X] = TRUE; prop[SDOF_ZERO_ROT_Y] = TRUE; } The lift coefficient should be indepedent of the stiffness, k, right? Thanks in advance |
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January 31, 2022, 11:57 |
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#2 |
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Bradley
Join Date: Jan 2022
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im also doing the same thing may I know how to use udf its self, from what I know is by using the dynamic mesh and select the square ?
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