Solvers

NX ELECTRONIC SYSTEMS COOLING

Solver supports axisymetric solutions: plane is either XZ or XY, and axis is either Z or X

Beam Options

Solver Languages

Solver Properties

UI Name Automation (neutral) Name Value type Range Default Value
Convergence Criteria Steady State - Convergence Criteria integer
Valid Options
Automatic=0
Specify=1
0
Maximum Temperature Change

see note (1)

 Steady State - Maximum Temperature Change double 0.000 to FLT_MAX 0.001
Heat Imbalance

see note (2)

 Steady State - Heat Imbalance boolean true or false true
Heat Imbalance Option

see note (3)

 Heat Imbalance Option integer
Valid Options
Global Fraction=0
Absolute=1
0
Global Fraction

see note (4)

 Global Fraction double 0.000 to FLT_MAX 0.01
Absolute

see note (5)

 Absolute double 0.000 to FLT_MAX 1
Iteration Limit Thermal Steady State - Iteration Limit integer 1 to INT_MAX 10000
Maximum Temperature Change Transient - Maximum Temperature Change double 0.000 to FLT_MAX 0.1
Iteration Limit Thermal Transient - Iteration Limit integer 1 to INT_MAX 10000
Relaxation Factor Relaxation Factor double 0.000 to 1.000 1
Convergence Trace Convergence Trace boolean true or false true
Pressure Convergence Criterion Duct Flow Pressure Convergence Criteria double 0.000 to FLT_MAX 0.01
Iteration Limit Duct Flow Iteration Limit integer 1 to INT_MAX 100
Relaxation Factor Duct Flow Relaxation Factor double 0.000 to 1.000 1
Convergence Trace Duct Flow Convergence Trace boolean true or false true
Convergence Criterion Convergence Criterion double 0.000 to FLT_MAX 1e-008
Iteration Limit Conjugate Gradient Solver Iteration Limit integer 1 to INT_MAX 100
Convergence Matrix Fill Value Convergence Matrix Fill Value integer 0 to INT_MAX 10
Element Discretization Element Discretization integer
Valid Options
Element Center Method=0
Element CG Method=1
CAE_DefaultEscElementDiscretization
Shell Accuracy

see note (6)

 Shell Accuracy integer
Valid Options
First Order=0
Second Order=1
CAE_DefaultEscElementAccuracy
Solid Element Capacitance Distribution

see note (7)

 Solid Element Capacitance Distribution integer
Valid Options
At CGs=0
At Boundary Elements=1
CAE_DefaultEscElementCapacitance
Element Convention for Temperature Constraint

see note (8)

 Element Convention for Temperature Constraint integer
Valid Options
Constrain Temperature at CG only=0
Constrain Temperature at CG and Boundary Elements=1
CAE_DefaultEscElementSink
Duct Thermal Discretization Duct Thermal Discretization integer
Valid Options
Advection and No Conduction=0
Advection and Conduction=1
Exponential Advection=2
CAE_DefaultEscDuctDiscretization
Steady State - Relaxation Time Step Steady State - Relaxation Time Step integer
Valid Options
Physical=0
Local=1
0
Time Step

see note (9)

 Time Step double 0.000 to FLT_MAX 0.5
Time Step Factor

see note (10)

 Time Step Factor double 0.000 to FLT_MAX 20
Convergence Criteria Convergence Criteria integer
Valid Options
Max Residuals=0
RMS Residuals=1
1
Maximum Residuals Maximum Residuals double 0.000 to FLT_MAX 0.0002
Global Flow Imbalance Fraction Option Global Flow Imbalance Fraction Option boolean true or false true
Global Flow Imbalance Fraction

see note (11)

 Global Flow Imbalance Fraction double 0.000 to 1.000 0.02
Global Heat Imbalance Fraction Option Global Heat Imbalance Fraction Option boolean true or false false
Global Heat Imbalance Fraction

see note (12)

 Global Heat Imbalance Fraction double 0.000 to 1.000 0.02
Steady State - Iteration Limit 3D Flow Steady State - Iteration Limit integer 1 to INT_MAX 1000
Transient - Iteration Limit 3D Flow Transient - Iteration Limit integer 1 to INT_MAX 100
Freeze Flow Field at Convergence Freeze Flow Field at Convergence for Steady State boolean true or false true
Restart Flow Field

see note (13)

 Restart Flow Field for Steady State boolean true or false true
Restart Temperature Change

see note (14)

 Restart Temperature Change for Steady State double -FLT_MAX to FLT_MAX 2
Freeze Flow Field Based on Solution Evolution Freeze Flow Field for Transient boolean true or false true
Maximum Normalized Velocity Change

see note (15)

 Maximum Normalized Velocity Change double 0.000 to FLT_MAX 1
Maximum Normalized Pressure Change

see note (16)

 Maximum Normalized Pressure Change double 0.000 to FLT_MAX 1e-008
Restart Flow Field

see note (17)

 Restart Flow Field for Transient boolean true or false true
Restart Temperature Change

see note (18)

 Restart Temperature Change for Transient double -FLT_MAX to FLT_MAX 2
Freeze Flow Field at Specified Times Freeze Flow Field at Specified Times boolean true or false true
Freeze Flow Field Specified Times

see note (19)

 Freeze Flow Field Specified Times double array 0.000 to FLT_MAX --
Reactivate Flow Calculation at Specified Times

see note (20)

 Reactivate Flow Calculation at Specified Times boolean true or false true
Reactivate Flow Calculation Specified Times

see note (21)

 Reactivate Flow Calculation Specified Times double array 0.000 to FLT_MAX --
Global Global Relaxation Factor double 0.000 to 1.000 0.75
Mass Mass Relaxation Factor double 0.000 to 1.000 0.75
Fluids Fluids Relaxation Factor double 0.000 to 1.000 0.9
Turbulence Turbulence Relaxation Factor double 0.000 to 1.000 1
Screen Resistance Screen Resistance Relaxation Factor double 0.000 to 1.000 0.25
Fan Curves (I/O/Internal Fans) Fan Curves (I/O/Internal Fans) Relaxation Factor double 0.000 to 1.000 1
Fan Curves (Recirculation Fans) Fan Curves (Recirculation Fans) Relaxation Factor double 0.000 to 1.000 1
Momentum Momentum Advection Scheme integer
Valid Options
First-order=0
Second-order (QUICK)=1
Second-order (SOU)=2
Second-order (CDS)=3
0
Limiter

see note (22)

 Momentum Limiter Option integer
Valid Options
Automatic=0
Specify=1
0
Momentum Limiter Stabilization

see note (23)

 Momentum Limiter Stabilization integer
Valid Options
General Convective Boundedness Condition=0
Stabilized Convective Boundedness Condition=1
0
Momentum Limiter

see note (24)

 Momentum Limiter double 0.000 to FLT_MAX 1
Energy Energy Advection Scheme integer
Valid Options
First-order=0
Second-order (QUICK)=1
Second-order (SOU)=2
Second-order (CDS)=3
0
Limiter

see note (25)

 Energy Limiter Option integer
Valid Options
Automatic=0
Specify=1
0
Energy Limiter Stabilization

see note (26)

 Energy Limiter Stabilization integer
Valid Options
General Convective Boundedness Condition=0
Stabilized Convective Boundedness Condition=1
0
Energy Limiter

see note (27)

 Energy Limiter double 0.000 to FLT_MAX 1
Two-Equation Turbulence Model K-Epsilon Advection Scheme integer
Valid Options
First-order=0
Second-order (QUICK)=1
Second-order (SOU)=2
Second-order (CDS)=3
0
Limiter

see note (28)

 K-Epsilon Limiter Option integer
Valid Options
Automatic=0
Specify=1
0
Two-Equation Limiter Stabilization

see note (29)

 K-Epsilon Limiter Stabilization integer
Valid Options
General Convective Boundedness Condition=0
Stabilized Convective Boundedness Condition=1
0
Two-Equation Limiter

see note (30)

 K-Epsilon Limiter double 0.000 to FLT_MAX 1
Humidity, Tracer Fluids and Homogeneous Mixtures Humidity Tracer Fluids Homogeneous Mixtures Advection Scheme integer
Valid Options
First-order=0
Second-order (QUICK)=1
Second-order (SOU)=2
Second-order (CDS)=3
0
Limiter

see note (31)

 Humidity Tracer Fluids Homogeneous Mixtures Limiter Option integer
Valid Options
Automatic=0
Specify=1
0
Humidity, Tracer Fluids and Homogeneous Mixtures Limiter Stabilization

see note (32)

 Humidity Tracer Fluids Homogeneous Mixtures Limiter Stabilization integer
Valid Options
General Convective Boundedness Condition=0
Stabilized Convective Boundedness Condition=1
0
Humidity, Tracer Fluids and Homogeneous Mixtures Limiter

see note (33)

 Humidity Tracer Fluids Homogeneous Mixtures Limiter double 0.000 to FLT_MAX 1
Buoyancy Model Buoyancy Model integer
Valid Options
Boussinesq=0
Full with Hydrostatic Pressure=1
0
Steady State Injection Duration Injection Duration double 0.000 to FLT_MAX 100
Steady State Simulation Time Steady State Simulation Time integer
Valid Options
Match Injection Duration=0
Specify=1
0
Total Time

see note (34)

 Total Time double 0.000 to FLT_MAX 100
Steady State Output Option Output Option integer
Valid Options
Number of Outputs=0
Output Interval=1
0
Number of Outputs

see note (35)

 Number of Outputs integer 1 to INT_MAX 10
Output Interval

see note (36)

 Output Interval double 0.000 to FLT_MAX 10
Neglect Stochastic Drag Terms Neglect Stochastic Drag Terms boolean true or false true
Use Cunningham Correction Factor Use Cunningham Correction Factor boolean true or false true
Sutherland Constant

see note (37)

 Sutherland Constant double -273.150 to FLT_MAX --
Slip Correction Reference Temperature

see note (38)

 Slip Correction Reference Temperature double -273.150 to FLT_MAX --
Slip Correction Reference Pressure

see note (39)

 Slip Correction Reference Pressure double 0.000 to FLT_MAX --
Slip Correction Reference Dynamic Viscosity

see note (40)

 Slip Correction Reference Dynamic Viscosity double 0.000 to FLT_MAX --
Communication Frequency Communication Frequency integer 1 to INT_MAX 1
Maximum Temperature Change Coupled Solver Maximum Temperature Change double 0.000 to FLT_MAX 0.1
Global Heat Imbalance Fraction Coupled Solver Global Heat Imbalance Fraction double 0.000 to FLT_MAX 0.01
View Factor Adjustment View Factor Adjustment integer
Valid Options
Self=0
Normalized=1
Residual to Radiative Environment=2
0
Small View Factors Small View Factors integer
Valid Options
Dispose of=0
Dispose up to=1
0
View Factors less than

see note (41)

 View Factors less than double 0.000 to FLT_MAX 1e-012
Sum of Disposed View Factors less than

see note (42)

 Sum of Disposed View Factors less than double 0.000 to FLT_MAX 0.05
Use Radiation Patches Use Radiation Patches boolean true or false true
On Screen Rendering On Screen Rendering boolean true or false true
Ignore specular and transparent effects for radiation request calculations Ignore specular and transparent effects for radiation request calculations boolean true or false false
Allow all elements to shadow for orbital and solar heating requests Allow all elements to shadow for orbital and solar heating requests boolean true or false true
Use Segregated Radiation Solver Use Segregated Radiation Solver boolean true or false true
Create a radiation enclosure from all flow surface elements Create a radiation enclosure from all flow surface elements boolean true or false true
Element Subdivision Element Subdivision integer
Valid Options
0 (None)=0
1=1
2=2
3=3
4=4
5 (Very Precise)=5
3
Close End of Beams Close End of Beams boolean true or false true
Bands Bands integer
Valid Options
Solar and IR=0
Based on Temperature Range=1
Based on Key Temperatures=2
Equal Power Intervals=3
Wavelength Range=4
Specify Wavelength=5
0
Minimum Black Body Temperature

see note (43)

 Minimum Black Body Temperature double -273.150 to FLT_MAX --
Maximum Black Body Temperature

see note (44)

 Maximum Black Body Temperature double -273.150 to FLT_MAX --
Black Body Temperature Table

see note (45)

 Black Body Temperature Table double array -273.150 to FLT_MAX --
Black Body Temperature

see note (46)

 Black Body Temperature double -273.150 to FLT_MAX --
Total Number of Bands

see note (47)

 Total Number of Bands integer 2to 2 2
Minimum Wavelength

see note (48)

 Minimum Wavelength double 0.000 to FLT_MAX --
Maximum Wavelength

see note (49)

 Maximum Wavelength double 0.000 to FLT_MAX --
Number of Bands in Range

see note (50)

 Number of Bands in Range integer 1to 1 1
Wavelength Breakpoint Table

see note (51)

 Wavelength Breakpoint Table double array 0.000 to FLT_MAX --
Spectral Model

see note (52)

 Spectral Model integer
Valid Options
Full Multi-Bands=0
One Band for IR=1
0
Solar to IR Transition Wavelength Solar to IR Transition Wavelength double 0.000 to 3.000 0.003
Solar Intensity versus Wavelength Solar Intensity versus Wavelength boolean true or false true
Solar Intensity Table

see note (53)

 Solar Intensity Table scalar field wrapper 0.000 to FLT_MAX --

Notes

  1. This property is only valid when parent property "Steady State - Convergence Criteria" has a value of 1
  2. This property is only valid when parent property "Steady State - Convergence Criteria" has a value of 1
  3. This property is only valid when parent property "Steady State - Heat Imbalance" has a value of 1
  4. This property is only valid when parent property "Heat Imbalance Option" has a value of 0
  5. This property is only valid when parent property "Heat Imbalance Option" has a value of 1
  6. This property is only valid when parent property "Element Discretization" has a value of 1
  7. This property is only valid when parent property "Element Discretization" has a value of 1
  8. This property is only valid when parent property "Element Discretization" has a value of 1
  9. This property is only valid when parent property "Steady State - Relaxation Time Step" has a value of 0
  10. This property is only valid when parent property "Steady State - Relaxation Time Step" has a value of 1
  11. This property is only valid when parent property "Global Flow Imbalance Fraction Option" has a value of 1
  12. This property is only valid when parent property "Global Heat Imbalance Fraction Option" has a value of 1
  13. This property is only valid when parent property "Freeze Flow Field at Convergence for Steady State" has a value of 1
  14. This property is only valid when parent property "Restart Flow Field for Steady State" has a value of 1
  15. This property is only valid when parent property "Freeze Flow Field for Transient" has a value of 1
  16. This property is only valid when parent property "Freeze Flow Field for Transient" has a value of 1
  17. This property is only valid when parent property "Freeze Flow Field for Transient" has a value of 1
  18. This property is only valid when parent property "Restart Flow Field for Transient" has a value of 1
  19. This property is only valid when parent property "Freeze Flow Field at Specified Times" has a value of 1
  20. This property is only valid when parent property "Freeze Flow Field at Specified Times" has a value of 1
  21. This property is only valid when parent property "Reactivate Flow Calculation at Specified Times" has a value of 1
  22. This property is only valid when parent property "Momentum Advection Scheme" has a value of 1
  23. This property is only valid when parent property "Momentum Limiter Option" has a value of 0
  24. This property is only valid when parent property "Momentum Limiter Option" has a value of 1
  25. This property is only valid when parent property "Energy Advection Scheme" has a value of 1
  26. This property is only valid when parent property "Energy Limiter Option" has a value of 0
  27. This property is only valid when parent property "Energy Limiter Option" has a value of 1
  28. This property is only valid when parent property "K-Epsilon Advection Scheme" has a value of 1
  29. This property is only valid when parent property "K-Epsilon Limiter Option" has a value of 0
  30. This property is only valid when parent property "K-Epsilon Limiter Option" has a value of 1
  31. This property is only valid when parent property "Humidity Tracer Fluids Homogeneous Mixtures Advection Scheme" has a value of 1
  32. This property is only valid when parent property "Humidity Tracer Fluids Homogeneous Mixtures Limiter Option" has a value of 0
  33. This property is only valid when parent property "Humidity Tracer Fluids Homogeneous Mixtures Limiter Option" has a value of 1
  34. This property is only valid when parent property "Steady State Simulation Time" has a value of 1
  35. This property is only valid when parent property "Output Option" has a value of 0
  36. This property is only valid when parent property "Output Option" has a value of 1
  37. This property is only valid when parent property "Use Cunningham Correction Factor" has a value of 1
  38. This property is only valid when parent property "Use Cunningham Correction Factor" has a value of 1
  39. This property is only valid when parent property "Use Cunningham Correction Factor" has a value of 1
  40. This property is only valid when parent property "Use Cunningham Correction Factor" has a value of 1
  41. This property is only valid when parent property "Small View Factors" has a value of 0
  42. This property is only valid when parent property "Small View Factors" has a value of 1
  43. This property is only valid when parent property "Bands" has a value of 1
  44. This property is only valid when parent property "Bands" has a value of 1
  45. This property is only valid when parent property "Bands" has a value of 2
  46. This property is only valid when parent property "Bands" has a value of 3
  47. This property is only valid when parent property "Bands" has a value of 1
  48. This property is only valid when parent property "Bands" has a value of 4
  49. This property is only valid when parent property "Bands" has a value of 4
  50. This property is only valid when parent property "Bands" has a value of 4
  51. This property is only valid when parent property "Bands" has a value of 5
  52. This property is only valid when parent property "Bands" has a value of 1
  53. This property is only valid when parent property "Solar Intensity versus Wavelength" has a value of 1