CAE Software【Femtet】Murata Software Co., Ltd.
A fan is placed inside the case to cool the heat source.
The fan pressure and the flow rate are determined by the pressure loss. The operating point of the fan can be output as well.
The monitoring values are used for convergence judgment.
The temperature distribution and the heat flux vectors are solved.
The results can be viewed by the simultaneous display of temperature contours and streamlines.
Unless specified in the list below, the default conditions will be applied.
Item |
Setting |
Analysis Space |
3D |
Model Unit |
m |
Item |
Setting |
Solver |
Fluid analysis [Bernoulli] Thermal analysis [Watt] |
Analysis Type |
Fluid analysis: Steady-state analysis Thermal analysis: Steady-state analysis |
Detailed Setting |
Convergence judgment by monitoring value Enable |
Tab |
Monitoring Quantity |
Setting |
Monitoring |
Temperature |
Monitoring Domain: select Body Attribute |
Volumetric Flow Rate |
Monitoring Domain: select Body Attribute |
The heat dissipation of the heat source in the case is calculated.
A fan and a vent are set on the case.
Body Number/Type |
Body Attribute Name |
Material Name |
3/Solid |
Source |
Si |
5/Solid |
Case |
001_Al * |
6/Solid |
Fan |
000_Air * |
7/Solid |
Air |
000_Air * |
* Available from the material DB
Body Attribute Name |
Tab |
Setting |
|||||||||
Fan |
Fluid |
Inflow and outflow faces are set to the circular model
Fluid body type: Specify flow Inlet/outlet type: Fan P-Q characteristics
|
Boundary Condition Name/Topology |
Tab |
Boundary Condition Type |
Setting |
Outer Boundary Condition |
Fluid-Thermal |
Inlet/Outlet |
Natural inflow/outflow Inflow temperature: Use ambient temperature (25[deg]) |
The calculation was terminated by the monitoring values for convergence judgment before the residual converges.
Below are the transitions of the flow rate of the fan and the maximum temperatures of each body attribute that are registered as the monitoring values in advance.
(Displayable by clicking Check Convergence Status button in the dialog box after the analysis finishes)
Since the results are almost constant, it can be interpreted to be acceptable to terminate the calculation before the residual converges.
The figure below shows the streamlines and the contours of temperature distribution of the heat source at the same time. The contour field of the case is hidden.
The air flows into the case from the vent and flows out through the fan.
The operating point of the fan can be viewed in the result table.
By displaying on the graph, the operating point can be located on the P-Q characteristic.