high resolution scheme
 

Hi all,
I run my simple model with high resolution scheme(which I think it's the seocond order accuracy) in steady state analysis with blood flow properties. Then I run the model again with high resolution scheme again but this time I also set up the momentum equation to be solved with blend factor "1" And I 've got different result for energy loss with 50% difference. Could anyone explain it to me why it's like that and if we want to have more accurate result especially in biomedical analysis which scheme is more reliable.

Kind regards