u/Downtown-Size-9203

I am a Hydraulic student and my graduation is aproaching I have about 54 variants to do but my biggest problem is having a backflow from the outlet , I tried everything that I can but I couldn't find the issue , I know that it's a minor thing that I am doing that causes this problem but there's no one that know Ansys good enough to consult them (Ansys isn't taught in our uni my profesor like it and suggested to me to use it)
you'll find everything you need underneath please help your junior
https://drive.google.com/drive/folders/1c0uOGFRU42VZ8nWK4Y9bi_2JLUicS_nR?usp=drive_link