cfx中求解电场力需要许可文件么，求教大家了

在Fluid model 中的勾选

然后提示In Analysis 'Flow Analysis 1' - Domain 'Default Domain Modified': Simulations using the Electromagnetic Model require an ANSYS CFD MHD license. A case using the Electromagnetic Model can be set up in CFX-Pre, but will only be able to run in the solver with the required license available. Please contact your ANSYS representative for further details.