[hmasenger]

Hello my friends
I need to rotate a butterfly valve's disk from 45 degree to 90 degree installed in a pipe.
first of all I activated the mesh deformation and set its parameters as can be seen in pic no1.next , I defined a coordinate system in the middle of the disk an then set an expression
“rotation=0.08[m/s]*t”
to rotate the disk clockwise by 5 degree(0.08radian) per every time step Although i am using steady state results for initial condition .I think something is wrong with this expression because solver doesn’t run and crashes out.
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Please help me with the expression.
5 degree is equal to 0.08 radians in the expression so I multiplied it to [m/s] to have a [m] dimension after multiplying by time .i don’t know why cfx doesn’t have degree unit for theta parameter in cylindrical displacement (pic no 3)and the expression’s dimension must be in meter or millimeter !
Is it right to use “t” parameter to define time step in expression?