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how to use Total Mesh Displacement for making a subject translating and rotating?

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Old   September 15, 2009, 12:23
Default how to use Total Mesh Displacement for making a subject translating and rotating?
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stb
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when i import ccl , it is ok. But unfortunately, when set subdomain displacement, terror happened as follow:

Parameter 'Displacement X Component' in object '/FLOW:Flow Analysis 1/DOMAIN:moving/SUBDOMAIN:Subdomain1/MESH MOTION/DISPLACEMENT' has been assigned an expression that references the following unavailable variables: Total Mesh Displacement X,Total Mesh Displacement Y
Parameter 'Displacement Y Component' in object '/FLOW:Flow Analysis 1/DOMAIN:moving/SUBDOMAIN:Subdomain 1/MESH MOTION/DISPLACEMENT' has been assigned an expression that references the following unavailable variables: Total Mesh Displacement X,Total Mesh Displacement Y

what happened? I use cfx 12.0 version. need your help,thank you.
my ccl is :

LIBRARY:
CEL:
EXPRESSIONS:
omega = 3.14[radian s^-1]/2.0*sin(3.14[s^-1]*t)
sy = 1.0[m]/3.14159*(1.0-cos(3.14159[s^-1]*t))
x0= x-Total Mesh Displacement X
y0 = y-Total Mesh Displacement Y
R0 = sqrt(x0^2+y0^2)
alpha0 = atan2(y0,x0)
alpha1 = omega*t
Xcomp = R0*(cos(alpha1)-cos(alpha0))
Ycomp = R0*(sin(alpha1)-sin(alpha0))+sy
END
END
END
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Old   September 15, 2009, 23:28
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can anybody give me opinion?thnaks a lot.
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Old   September 16, 2009, 00:32
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The error message explains the issue. You have made the parameter Displacement X/Y Component a function of the variable Total Mesh Displacement X/Y. You can't do that. You will have to find another variable to make it a function of.
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Old   September 16, 2009, 04:06
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Quote:
Originally Posted by ghorrocks View Post
The error message explains the issue. You have made the parameter Displacement X/Y Component a function of the variable Total Mesh Displacement X/Y. You can't do that. You will have to find another variable to make it a function of.
thank you very much for your suggestion. in order to keep the mesh quality fine during moving, subdomain 1 is created. set subdomian moving up and down along y direction and at that time it also rotates around subdomain's centriod axes.

i don't know how to make it work correctly. i have tried many ways . is any variable can be used to figure it out? please tell me in detail. thank you.
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