Hi @shubhj21,
The first thing I’d like to share with you is this article on convergence of simulation:
Applying the workflow there, you’ll see that your run failed here:
Taking a look at the mesh’s quality in that region, you’ll see that it’s very distorted and the boundary layers are breaking:
To solve that, an option might be to apply a local element size there or to control the fineness of the boundary layers manually with an inflate boundary layer region refinement.
For more information on checking and improving mesh quality, please take a look:
Tell me if that helps 
Best,
Igor