Thank you very much for your reply and help, I feel good by reading your message.
my research topic is about multiphase flows, math and also programmation in Matlab and C++.

I would know how to start again smartly? without spend time and overthink.

Thank you

it's been a month I do nothing. I think about my situation. May be desperate...
But I understand it's not benefic and I should move and don't lose hope, that's why I write this message to you and search help.
Could you share with me the way you work, and how could you concentrate in your topic and how you make your plans and your "to do list".
Thank you a lot

I have discussed all things I have tried, the answer is, show me good results not try (without any remark)

I don't have any plan approved by my supervisor.
I should find the problematic of my subject alone and I try many ideas and I don't achieve anything interesting.
I have to find the model and method of resolution without any help and advice. that is normal??

Hello
Thank you for your reply.
computational fluid dynamics.

Hello
I am a Phd Student and I just finished my second year, two years and no progression and no publications.
I work hard but no result, because I can't find a solution for my problem and understand what wrong with my topic, my supervisor don't give me any help. I'm depressed...
I don't know what I can do:
1- change the thesis.
2-continue and don't give up

any help please :( ???

Best regards