Modelling and simulation of flow through a flowbench
Aim:
In this project, you have create a 3D model of a flow bench and run flow analysis & preform following test:
Grid dependence test: For three grids run simulation at a particular valve lift and explain results.
Effect of valve lift on mass flow rate: Run a parametric sweep to show the effect of valve lift on mass flow rate.
Input Parameters:
External Diameter of cylinder: 200mm
External Diameter of Inlet Port: 40mm
Shell: 5mm
Inlet Total Pressure: 401325[Pa] at temperature 293.2[K]
Outlet Static Pressure: 101325[Pa] at temperature 293.2[K]
3D Model:
Test 1: Grid dependence test:
Valve Lift: 5mm
Case 1: Grid refinement 3
Pressure
Velocity:
Case 2: Grid Refinement 4
Pressure
Velocity
Case 3: Grid Refinement 5
Pressure
Velocity
Conclusion: Comparing the above figures, we can see the third case shows a better results in terms of velocity variation & distortion,So third case (Grid refinement 5) is chosen for further analysis.
Test 2: Effect of valve lift on mass flow rate:
We are considering value lift 2mm to 7 mm in interval 1mm.
Case 1: 2mm
Velocity:
Pressure:
Case 2: 3mm
Velocity:
Pressure:
Case 3: 4mm
Velocity:
Pressure:
Case 4: 5mm
Velocity:
Pressure:
Case 5: 6mm
Velocity:
Pressure:
Case 6: 7mm
Velocity:
Pressure:
Mass Flow Variation:
Note: Mass Flow are showing negative because fluid is coming out from Face 2. We have to consider absolute values of mass flow rates.
Conclusion:
As value lift increses, mass flow rate from valve also increses.