Dynamic mesh(translational) boundary condition?
 

Hi,

I am carrying out a simulation with a translational mesh, which is realized by a UDF. This is an incompressible 2D case with turbulence model, and a SIMPLE scheme is chosen. Both spatial and temporal discretization is 2nd-order in accuracy.
The boundary conditions are shown on the picture attached. Inside the flow field is an airfoil. Velocity inlet is specified with a ux=U and uy=0. The whole field is sinking in a uniform velocity.
The problem is, as shown in the sketched picture, a high pressure region appears in the corner of the flowfield, which is not expected.
Does anyone have any idea of this problem? Any suggestion is appretiated.
Thanks.https://photo.weibo.com/2624782587/w...xz4j212x0u0ju6

https://photo.weibo.com/2624782587/w...xz4j212x0u0ju6
Here is the picture.

Try once again posing the picture:o
https://photo.weibo.com/2624782587/w...8pyj211g0u03zx

Sketched picture see:
https://photo.weibo.com/2624782587/w...xz4j212x0u0ju6