Date

2008/06/24 17:18:42

Contents

1. File Report
    Table 1  File Information for 4 ladder7_001
2. Mesh Report
    Table 2  Mesh Information for 4 ladder7_001
3. Physics Report
    Table 3  Domain Physics for 4 ladder7_001
    Table 4  Boundary Physics for 4 ladder7_001
4. User Data
    Figure 1
    Figure 2
    Figure 3
    Figure 4
    Figure 5
    Figure 6
5. Summary

1. File Report

Table 1.  File Information for 4 ladder7_001
Case 4 ladder7_001
File Path C:\Documents and Settings\hhwieman\My Documents\aps project\mechanical\cfx pixel\longer 4 ladder clean\4 ladder7_001.res
File Date 23 June 2008
File Time 06:49:03 PM
File Type CFX5
File Version 11.0
Fluids Air at 25 C
Solids c dumb,si dumb
Particles None
 

2. Mesh Report

Table 2.  Mesh Information for 4 ladder7_001
Domain Nodes Elements
air 381885 1966528
c 126678 567312
si 1 15273 64471
si 2 19022 82280
si 3 19549 84756
si 4 18275 78491
All Domains 580682 2843838
 

3. Physics Report

Table 3.  Domain Physics for 4 ladder7_001
Name Location Type Materials Models
air B176 Fluid Air at 25 C Heat Transfer Model = Thermal Energy
Turbulence Model = k epsilon
Turbulent Wall Functions = Scalable
Buoyancy Model = Non Buoyant
Domain Motion = Stationary
c B174 Solid c dumb Domain Motion = Stationary
si 1 B175 Solid si dumb Domain Motion = Stationary
si 2 B177 Solid si dumb Domain Motion = Stationary
si 3 B178 Solid si dumb Domain Motion = Stationary
si 4 B173 Solid si dumb Domain Motion = Stationary
 
Table 4.  Boundary Physics for 4 ladder7_001
Domain Name Location Type Settings
air inlet inlet Inlet Flow Regime = Subsonic
Heat Transfer = Static Temperature
Static Temperature = 23 [C]
Normal Speed = 8 [m s^-1]
Mass And Momentum = Normal Speed
Turbulence = Medium Intensity and Eddy Viscosity Ratio
air Default Fluid Solid Interface in air Side 1 F217.176, F209.176, F150.176, F201.176, F191.176, F1... Interface Heat Transfer = Conservative Interface Flux
Wall Influence On Flow = No Slip
Wall Roughness = Smooth Wall
air outlet outlet Opening Flow Direction = Normal to Boundary Condition
Flow Regime = Subsonic
Opening Temperature = 23 [C]
Heat Transfer = Opening Temperature
Mass And Momentum = Opening Pressure and Direction
Relative Pressure = 0 [Pa]
Turbulence = Medium Intensity and Eddy Viscosity Ratio
air air Default F155.176, F156.176, F157.176, F158.176, F159.176, F1... Wall Heat Transfer = Adiabatic
Wall Influence On Flow = No Slip
Wall Roughness = Smooth Wall
c Default Fluid Solid Interface in c Side 1 F211.174, F181.174, F215.174, F212.174, F153.174, F2... Interface Heat Transfer = Conservative Interface Flux
c Default Solid Solid Interface in c Side 1 F194.174, F200.174, F187.174, F152.174 Interface Heat Transfer = Conservative Interface Flux
c c Default F208.174 Wall Heat Transfer = Adiabatic
si 1 Default Fluid Solid Interface Side 2 F179.175, F185.175, F186.175, F188.175, F183.175 Interface Heat Transfer = Conservative Interface Flux
si 1 Default Solid Solid Interface in si 1 Side 2 F187.175 Interface Heat Transfer = Conservative Interface Flux
si 1 si 1 Default F184.175 Wall Heat Transfer = Adiabatic
si 2 Default Fluid Solid Interface in si 2 Side 2 F180.177, F193.177, F189.177, F192.177, F191.177 Interface Heat Transfer = Conservative Interface Flux
si 2 Default Solid Solid Interface in si 2 Side 2 F194.177 Interface Heat Transfer = Conservative Interface Flux
si 2 si 2 Default F190.177 Wall Heat Transfer = Adiabatic
si 3 Default Fluid Solid Interface in si 3 Side 2 F197.178, F198.178, F195.178, F182.178, F199.178 Interface Heat Transfer = Conservative Interface Flux
si 3 Default Solid Solid Interface in si 3 Side 2 F200.178 Interface Heat Transfer = Conservative Interface Flux
si 3 si 3 Default F196.178 Wall Heat Transfer = Adiabatic
si 4 Default Fluid Solid Interface in si 4 Side 2 F204.173, F206.173, F203.173, F201.173, F205.173 Interface Heat Transfer = Conservative Interface Flux
si 4 Default Solid Solid Interface in si 4 Side 2 F152.173 Interface Heat Transfer = Conservative Interface Flux
si 4 si 4 Default F202.173 Wall Heat Transfer = Adiabatic
 

4. User Data

Figure 1.
Figure 1 - Report7/Figure001.png
Figure 2.
Figure 2 - Report7/Figure002.png
Figure 3.
Figure 3 - Report7/Figure003.png
Figure 4.
Figure 4 - Report7/Figure004.png
Figure 5.
Figure 5 - Report7/Figure005.png
Figure 6.
Figure 6 - Report7/Figure006.png

5. Summary

Summary

4 ladder7_001 (full length ladders .. high resolution)


Figures:

1. Stream lines showing air flow and velocity

2. Velocity contour at the mid plane

3. Temperature of all structures at the mid plane

4. Temperature of all structures on planes near the entrance, the middle and the module tube exit.

5. Surface temperature of the 4 silicon ladders

6. Stream line view showing starved region due to truncated geometry


Some results:


Maximum silicon temperature above ambient 16 deg. C


Inlet pressure to drive 8 m/s entrance flow: 59 Pa or .24 in H2O

Mass flow at inlet 0.0115 kg/s or 187 CFPM for total 10 module flow


The high resolution analysis here gives a higher silicon temperature, 16 deg over ambient as opposed to 12 for lower resolution. The outer ladder on the ? x direction is the warmest and this appears to be due to the limited geometry we used in this analysis. This is apparent in the Fig. 6 view of the streamlines. Note that the inset on the boundary tends to steer the flow away form the ladder on that side. The other ladders show an elevated temperature of closer to 12 deg C.


Features of the analysis.

Full length structure

8 m/s air at the inlet.

Heat input 100 mW/cm^2 on all 4 silicon surfaces

High resolution analysis