Mixing efficiency
Aim: Steady state simulations to comparing the Mixing efficency for diffrent cases.
Cases:
1. Short T pipe geometry with Momentum ratio 2
2. Long T pipe geometry with Momentum ratio 2
3. Short T pipe geometry with Momentum ratio 4
4. Long T pipe geometry with Momentum ratio 4
Where Momentum ratio = Velocity at cold inlet / velocity at hot inlet
Sotware Used : Ansys Fluent
Cad Cleanup: Using Space Claim
Fluid Region:
Case 1: Short T pipe geometry with Momentum ratio 2
Inputs:
Cold air Temperature = 190C
Cold air inlet velocity = 6m/s
Hot air Temperature = 360C
Hot air inlet velocity = 3m/s
Short T-Pipe geometry:
Meshing:
Creating Named sections:
Statistics:
Element Size = 2.5e-3m
Nodes = 10511
Elements = 49603
Setup Conditions:
Solver:
Models:
1. Energy Equation
2. k-epslion Realizable
Materials: Air
Model : k-epsilon
Plots:
Residual Graph:
CFD Post Processing:
Temperature Contour:
Temperature contour with mesh lines:
Velocity Contour:
velocity Contour with Mesh lines:
Model : k-omega SST
Plots:
Residual Graph:
Cfd Post processor:
Temperature Contour:
Velocity Contour:
Case 2 : Long T pipe geometry with Momentum ratio 2
Inputs:
Cold air Temperature = 190C
Cold air inlet velocity = 6m/s
Hot air Temperature = 360C
Hot air inlet velocity = 3m/s
Long Pipe Geometry:
Meshing:
Statistics:
Element Size = 2.5e-3m
Nodes = 24165
Elements = 117011
Setup Conditions:
Solver:
Models:
1. Energy Equation
2. k-epslion Realizable
Materials: Air
Plots:
Residual Graph:
Cfd Postprocessor:
Temperature Contour:
Velocity Contour:
Case 3 : Short T pipe geometry with Momentum ratio 4
Inputs:
Cold air Temperature = 190C
Cold air inlet velocity = 12m/s
Hot air Temperature = 360C
Hot air inlet velocity = 3m/s
Short T pipe Geometry:
Meshing:
Statistics:
Element Size = 2.5e-3m
Nodes = 10511
Elements = 49603
Setup Conditions:
Plots:
Residual Graph:
Cfd Post Processor:
Temperature Contour:
Velocity Contour:
Case 4 : Long T pipe geometry with Momentum ratio 4
Inputs:
Cold air Temperature = 190C
Cold air inlet velocity = 12m/s
Hot air Temperature = 360C
Hot air inlet velocity = 3m/s
Long pipe geometry:
Meshing:
Statistics:
Element Size = 2.5e-3m
Nodes = 24165
Elements = 117011
Setup Conditions:
Plots:
Residual Graph:
Cfd Postprocessor:
Temperature contour:
Velocity Contour:
