Table of Contents
1. Problem Description
2. Summary of Input Data
2.1 CAD Geometry
2.2 Physics
2.3 Properties
2.4 Boundary Conditions
2.5 Initial Conditions
2.6 Solution Control
2.7 Mesh
3. Summary of Output Data
3.1 Mass Flow Summary
3.2 Residual Summary
4. Results
Flow through the Intake Manifold of an Automobile is being
simulated. Air enters through the "Inlet" and exits the system through
four "Outlets". A small fraction of the Exhaust Gas is Recirculated
(EGR) into the sytem through the "EGR Inlet". The objective is to
analyze flow patterns and EGR mixture concentrations within the
Manifold.
The geometry consists of 1 part and 41 faces.
The scale of the geometry is in millimeters (mm). None of the
parts in the model was suppressed.
| Common Data |
| Time Dependence |
Steady |
| Gravity |
No |
| Flow Module |
| Reference Pressure |
100000 Pa |
| Turbulence |
Yes |
| Turbulence Model |
K Epsilon |
| Turbulent Prandtl No. |
0.7 |
| Turbulent Schmidt No. |
0.7 |
| Mixing |
Yes |
| Media |
Gas Phase |
| Solve For |
Mixture Mass Fractions |
| Air ( Gas ) |
| Physical |
| Density |
Constant |
| Rho |
1.147 kg/m³ |
| Fluid |
| Viscosity |
Constant(Dynamic) |
| Mu |
2e-005 kg/m-s |
| Thermal |
| Specific Heat |
Constant |
| Cp |
1007 J/kg-K |
| Thermal Conductivity |
Constant |
| K |
0.0263 W/m-K |
| GasChemical |
| Mass Diffusivity |
Schmidt Number |
| SCH |
0.7 |
Number of Walls: 1
Number of Rotating Walls: 0
Number of Symmetries: 0
Number of Inlets: 2
Number of Outlets: 1
Number of Fluid-Fluid Interfaces: 0
Number of Fluid-Solid Interfaces: 0
Number of Solid-Solid Interfaces: 0
| Wall ( Wall ) |
| Flow |
| X-Direction Velocity |
0 m/s |
| Y-Direction Velocity |
0 m/s |
| Z-Direction Velocity |
0 m/s |
| Turbulence |
| Roughness Height |
0 m |
| Mixing |
| Mixing Type |
Zero Flux |
| Heat |
| Heat Type |
Adiabatic |
| Wall Heat Source |
No Heat Source |
| Inlet ( Inlet ) |
| Flow |
| Pressure |
0 Pa |
| Temperature |
300 K |
| Flow Type |
Fix Vel.(Normal) |
| Normal Velocity |
0.4 m/s |
| Turbulence |
| Turbulence BC Values |
Fixed Value |
| Kinetic Energy |
Turbulence Intensity |
| Turbulence Intensity |
0.05 |
| Dissipation Rate |
Hydraulic Diameter |
| Hydraulic Diameter |
0.08 m |
| Mixing |
| Set Equivalence Ratio |
No |
| EGR Inlet ( Inlet ) |
| Flow |
| Pressure |
0 Pa |
| Temperature |
350 K |
| Flow Type |
Fix Vel.(Normal) |
| Normal Velocity |
0.04 m/s |
| Turbulence |
| Turbulence BC Values |
Fixed Value |
| Kinetic Energy |
Turbulence Intensity |
| Turbulence Intensity |
0.05 |
| Dissipation Rate |
Hydraulic Diameter |
| Hydraulic Diameter |
0.015 m |
| Mixing |
| Set Equivalence Ratio |
No |
| Outlet ( Outlet ) |
| Flow |
| Pressure |
0 Pa |
| Temperature |
300 K |
| Flow subtype |
Fixed Pressure |
| Turbulence |
| Backflow Kinetic Energy |
Turbulence Intensity |
| Turbulence Intensity |
0.05 |
| Backflow Dissipation Rate |
Hydraulic Diameter |
| Hydraulic Diameter |
0.04 m |
| Mixing |
| Set Equivalence Ratio |
No |
| Initial_1 |
| Flow |
| X-Direction Velocity |
0 m/s |
| Y-Direction Velocity |
0 m/s |
| Z-Direction Velocity |
0 m/s |
| Pressure |
0 Pa |
| Turbulence |
| Kinetic Energy |
Turbulence Intensity |
| Turbulence Intensity |
0.05 |
| Dissipation Rate |
Hydraulic Diameter |
| Hydraulic Diameter |
0.08 m |
| Mixing |
| Heat |
| Temperature |
300 K |
Association of Initial Conditions
| Initial Condition |
Associated Solid |
| Initial_1 |
Part_1 |
| Iterations and Accuracy |
| Convergence |
| Max. Iterations |
1000 |
| Converge to accuracy |
Medium |
| Inertial Relaxation |
| Velocities |
0.2 |
| P Correction |
0.2 |
| Turbulence |
0.2 |
| Mixtures |
0.05 |
| Enthalpy |
0.05 |
| Linear Relaxation |
| Pressure |
0.5 |
| Density |
1 |
| Viscosity |
1 |
| Temperature |
0.8 |
| Mesh Statistics |
| Cell Nodes |
55051 |
| Cell Faces |
383324 |
| Number of Cells |
267777 |
| Cell Edges |
170597 |
| Tets |
104237 |
| Pyramids |
23 |
| Prisms |
66337 |
| Mesh Quality |
| Faces under 2 degrees |
0 |
| Faces under 5 degrees |
0 |
| Worst Angle |
5.42406 |
| Negative Volumes |
0 |
| Smallest Volume |
0.0315017 |
| Total Volume |
3.05309e+006 |
Boundary-by-Boundary Mass Flow Summary (kg/sec)
|
Inflow |
Outflow |
Sum |
| Face_1 (Outlet) |
0 |
-0.000587273 |
-0.000587273 |
| Face_2 (Outlet) |
0 |
-0.000556789 |
-0.000556789 |
| Face_3 (Outlet) |
0 |
-0.000513161 |
-0.000513161 |
| Face_4 (Outlet) |
0 |
-0.000598625 |
-0.000598625 |
| Face_34 (Inlet) |
0.00224799 |
0 |
0.00224799 |
| Face_41 (Inlet) |
7.85619e-006 |
0 |
7.85619e-006 |
| Total volume source |
0 |
| Total Mass Flow |
0.00225585 |
-0.00225585 |
-1.47733e-009 |
Intake Manifold fluid domain
Streamlines through the Manifold
EGR Mixture Concentration
