Week 6.2 - Setting up a model (Hanging Node)

Aim: To perform thermal analysis for given Hanging node model.

Introduction of Challenge :

The model was received for week 5 assignment. Few components has considered as heat generated source and listed below their power ratings. There was marker points on few components in the given model. The model contained many electrical and mechanical components including fan and heat sink.

Heat Source:

TO252-128.2 - 0.2W
TO252-129.2 - 0.2W
SOIC-111.2 - 0.3W
SOIC-415.2 - 0.3W
SOIC-112.2 - 0.3W
SOIC-113.2 - 0.3w
SOIC-316.2 - 0.3W
QFP-433.2 - 1.5W
QFP-231.2 - 1.5W
QFP-332.2 - 1.5W
BGA-134.2 - 12W
BGA-235.2 - 6W
QFP-130-mold - 7W
TO252-221.2 - 0.2W
TO252-219.2 - 0.2W
TO252-220.2 - 0.2W
SOIC-214.2 - 0.3W
CPU_source - 40W
DIMM_Source-0 - 2W
DIMM_Source-1 - 2W
DIMM_Source-2 - 2W
DIMM_Source-3 - 2W
DIMM_Source-4 - 2W
DIMM_Source-5 - 2W
DIMM_Source-6 - 2W
DIMM_Source-7 - 2W

Properties of fan:

Considered fan speed is 4000 RPM

Mesh:

As we explained in assignment 5.2 mulit-level meshing, Initially, the mesh count was nearly 70000 with first cut coarse mesh control and not yet properly meshed especially in CAD objects.

So, I have used multi-level meshing for CAD objects and used non-conformal assemblies to avoid mesh bleeding.

Model:

Mesh Control:

X-Axis cut plane through center:

Y-Axis cut plane through center:

Z-Axis cut plane through center:

Solver Setting:

Enabled Flow(Velocity/Pressure) and Temperature variables.

Ratiation is disabled and used turbulent flow with zero equation.

Steady state transitent setup and used boussinesq natural convection.

No of iteration used 1000 and convergence criteria is for flow(1e-7), Energy(1e-10) and Joule heating(1e-7).

GPU computing is 1 and 4 parallel processor has used.

Post Proceesing:

Here, We can see all post processing plots.

Residual Plot:

Temperature Monitor Plot:

Velocity Plot:

Object Faced Contour Temperature Plot:

Object Faced Vector Temperature Plot:

Object Faced Vector Velocity Plot:

X-Axis cut plane through center (Contour Temprature):

Y-Axis cut plane through center(Contour Temprature):

Z-Axis cut plane through center(Contour Temprature):

X-Axis cut plane through center(Vector Velocity):

Y-Axis cut plane through center(Vector Velocity):

Z-Axis cut plane through center(Vector Velocity):

Conclusion:

We have done thermal analysis for Hanging node successfully and shown here is all obtained plots. The total heat generated on the Cabinet was 177W.