Optimizing Ejector
 

Hi I am a student of University of Indonesia. Now, I'm trying to optimizing an ejector pump. I try Ansys 5.4 to simulate it in 2D, but i've got the wrong result. And there is noone know Ansys. In simulation, i try to make an ejector using two kinds of fluid, air as primary fluid and water as secondary fluid. I've try to fill the boundary and the fluid properties (compressible), but when it is solve, the result become negative pressure. What should i do?

i am using flotran 2D. Please help me!!! if you want, maybe i could send the model via email. By the way, i am very thankful.

thanks Jujianto