Keyur Kanade
Ansys Employee

Please check the mesh and fix it. From histogram it looks like mesh has bad quality. Please use different sizing and remesh it in ICEM to improve mesh quality. 

Please go through help manual for more details 

You may also want to check Ansys Meshing for meshing procedures. 

Regards,

Keyur

How to access Ansys Online Help Document

Guidelines on the Student Community