Dear friends,

I am trying to run a 2-way coupled Fluid structure interaction problem in ANSYS. In this case, as you know, both ANSYS and CFX solver starts same time. I wanted to transfer pressure, temperature and wall heat transfer coefficients from CFX to ANSYS( in a transient mode). But when I introduce the interface between fluid and structure for transformation of results in this 2way coupled simulation e.g. by defining a wall between fluid and structure and saying:

Mesh Motion-

Option: ANSYS Multifield,

Receive from ANSYS: total mesh displacement,

ANSYS Interface: FSIN_1,

Send to ANSYS: Total force

and

Heat transfer-

Option: ANSYS Multifield,

Receive from ANSYS: wall heat flow,

ANSYS Interface: FSIN_1,

Send to ANSYS: Temperature,

It gives me following ERROR:

""Export results are unavailable as no suitable boundaries exist for use as export surfaces. Mesh motion on a boundary invalids its use as an export surface.""

Thanks Sohail Germany

Check if solid-fluid interface surfaces are matching exactly. Any difference between them can cause this error.

Best luck,

Chirag