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- - **ICEM and CYLINDRICAL CORDINATE SYSTEM**
(*https://www.cfd-online.com/Forums/ansys-meshing/66752-icem-cylindrical-cordinate-system.html*)

ICEM and CYLINDRICAL CORDINATE SYSTEMHi Everybody,
I have a problem,I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system. But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in ( r,theta,z) then i have my geometry in ( y,z) plane, so for the velocitiesthe radial velocity U(r) is in -------- y directionand U (theta) tangential velocity is in -------- x directionand U(z) is in ------------------------------- z direction---------------------------------------------------------------- after that i export my Mesh to Star-CD in boundary condition at the inlet part i change the coordinate system from cartesian to cylindrical from number 1 to number 2 from ( x,y,z) to (r,theta,z) then Star-CD consider that the radial velocity U(r) is --------------------- in x directionU (theta) is ----------------in y directionU(z) is ---------------------in z direction------------------------------------------------------------------- so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence---------------------------------------------------------------------- I am in waiting for your suggestion Thank you very much for you |

CFX and Cylindrical CoordinateHi Everybody,
I have a problem,I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system. But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in ( r,theta,z) then i have my geometry in ( y,z) plane, so for the velocitiesthe radial velocity U(r) is in -------- y directionand U (theta) tangential velocity is in -------- x directionand U(z) is in ------------------------------- z direction---------------------------------------------------------------- after that i export my Mesh to Star-CD in boundary condition at the inlet part i change the coordinate system from cartesian to cylindrical from number 1 to number 2 from ( x,y,z) to (r,theta,z) then Star-CD consider that the radial velocity U(r) is --------------------- in x directionU (theta) is ----------------in y directionU(z) is ---------------------in z direction------------------------------------------------------------------- so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence---------------------------------------------------------------------- I am in waiting for your suggestion Thank you very much for you |

So won't a simple rotation fix it up?
Glenn |

CFX and CYLINDRICAL CORDINATE SYSTEMHi Everybody,
I have a problem, I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system. But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in ( r,theta,z) then i have my geometry in ( y,z) plane, so for the velocitiesthe radial velocity U(r) is in -------- y directionand U (theta) tangential velocity is in -------- x directionand U(z) is in ------------------------------- z direction---------------------------------------------------------------- after that i export my Mesh to Star-CD in boundary condition at the inlet part i change the coordinate system from cartesian to cylindrical from number 1 to number 2 from ( x,y,z) to (r,theta,z) then Star-CD consider that the radial velocity U(r) is --------------------- in x directionU (theta) is ----------------in y directionU(z) is ---------------------in z direction------------------------------------------------------------------- so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence---------------------------------------------------------------------- I am in waiting for your suggestion ** I try to do all rotation of the plane but there is no changement in results ***Thank you very much for you |

CFX and Cylindrical CoordinateHi Everybody,
I have a problem, I have 2D simulation i build my geometry and my Mesh in ICEM-CFD, then I export them to Star-cd, all thing is well in the same coordinate system cartesian to cartesian coordinate system. But when i build my geometry and do my Mesh (ICEM-CFD) in cylindrical coordinate system in ( r,theta,z) then i have my geometry in ( y,z) plane, so for the velocitiesthe radial velocity U(r) is in -------- y directionand U (theta) tangential velocity is in -------- x directionand U(z) is in ------------------------------- z direction---------------------------------------------------------------- after that i export my Mesh to Star-CD in boundary condition at the inlet part i change the coordinate system from cartesian to cylindrical from number 1 to number 2 from ( x,y,z) to (r,theta,z) then Star-CD consider that the radial velocity U(r) is --------------------- in x directionU (theta) is ----------------in y directionU(z) is ---------------------in z direction------------------------------------------------------------------- so you can observe that there is a confusion in the axis from the initial case I try to do changement of the velocities to the axis I put U(r) in y direction and U (theta) in x direction then my simulation did not convergt i have got a bad convergence---------------------------------------------------------------------- I am in waiting for your suggestion ** I try to do all rotation of the plane but there is no changement in results ***Thank you very much for you |

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