Encyclopaedia Index

 
TITLE : HOTBOX EXAMPLE : THERMAL ANALYSIS OF PC DESKTOP ENCLOSURE
 
BY :  CHAM Development Team - F Liu DATE :   1999
FOR :  Demonstration Case
PHOENICS Version : HOTBOX VR 
NOTES :  Three-dimensional, steady flow, forced convection, conjugate heat transfer, Cartesian computational grid

Description of the problem:

Solution procedure: Results:

All the pictures as shown below are created via the Virtual Reality Graphic Interface, a strong feature of HOTBOX-VR.

1. Velocity vectors
Velocity vector across CPU in z direction
Velocity vector not across CPU in z direction
Velocity vector across CPU in x direction

From the figures above, the majority of air flow passes the power supply unit, the CPU and add-in cards, while little movement is found around the drive bays. This design is probably justified if the heat output from the drive bays is relatively smaller, which could be found out from the temperature contours.

2. Temperature contours
Temperature contour across CPU in z direction
Temperature contour not across CPU in z direction
Temperature contour across CPU in x direction
Temperature contour across Drive bay in x direction

It is clearly seen in this case, the CPU is the hottest component, while the temperatures around and inside disk drives are relatively lower despite of little air cooling.

3. Streamlines
A set of streamlines originating at the top vent

Conclusions: