hello, im new to flow simulation and i want some assistance with my project which is an underwater device with two thrusters. I don't understand why some of the results are negative and I'm not sure if my process is right or not. can someone guide me on how to use the flow simulation for underwater moving devices?

Edu ​​​​​​​SOLIDWORKS ​​​​​​​Flow Simulation ​​​​​​​