[palofpinaki]

I am performing 2-way coupled FSI for blood flow in axisymmetric abdominal aortic aneurysm. I am using k-omega turbulence model for analysis. But the following error is showing up everytime:

One or more elements have become highly distorted. Excessive distortion of elements is usually a symptom indicating the need for corrective action elsewhere. Try ramping the load up instead of step applying the load (KBC,1). You may need to improve your mesh to obtain elements with better aspect ratios. Also consider the behavior of materials, contact pairs, and/or constraint equations. If this message appears in the first iteration of first substep,be sure to run shape checking of elements.

If anybody has an idea regarding how to deal with the above error, please give suggestions.

Thanks in advance!!