Dear Jean,
I know that this website is not the code reviewer. I want to apply Neumann 
boundary condition on the curved side of my domain. It should be note that 
the domain is symmetry. I have considered half of a circle. It would be 
very kind of you if you let me know whether it is applied correctly because 
I think something is wrong when I run my code and my domain completely 
distorted. I am doubtful about how I applied the boundary condition. For 
the horizontal axis, I have considered the zero displacement along y-axis 
because of symmetry. Is it correct? Should I fix the center of the circle 
as well? How Can I do that? In other words, How can I fix one point 
(vertex) in 2-D? Looking forward to hearing from you. 

On Thursday, December 1, 2016 at 3:54:44 PM UTC-6, Jean-Paul Pelteret wrote:
> Dear Benhour,
> As I explained to someone else 
> <!searchin/dealii/Two$20points$3A%7Csort:date/dealii/azGWeZrIgR0/JErt9A9hAwAJ>
> the day before yesterday, the point of this forum is not to provide a code 
> review service without you having done due diligence on your side. Does 
> this not work as expected? If this is the case, then how is the problem 
> manifesting itself? Unless you have a specific issue pertaining to the code 
> that you have posted then I'm afraid that there's no discussion to be had 
> here.
> Regards,
> Jean-Paul

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