VIV Square Cylinder
Hey, so Im doing a simulation of viv for a square cylinder and Im trying to replicate the results of this article: http://www.sciencedirect.com/science...89974613000832
but so far I havent gotten close. Everything not moving (mesh, residuals etc.) has been validated so the parts Im not certain of is the dynamics, like the UDF and meshing settings. My UDF: #include "udf.h" DEFINE_SDOF_PROPERTIES(sdof_props,prop,dt,time,dti me) { real cg; real k = 3.20886; cg = DT_CG(dt)[1]; prop[SDOF_MASS] = 5; 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; } where k is calculated as 4*pi^2*fn*m where fn=3.1875/Re where Re=25 and m=5. The dynamic mesh settings Im using are: Smoothing, Layering, Six DOF and implicit update. With use of the SIMPLE scheme, Least Squares Cell Based, Standard and QUICK. Anyone got any ideas? Cheers |
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