Week 6 - CHT Analysis on a Graphics card

Problem Statement:

To Perform a steady-state conjugate heat transfer analysis on a model of a graphics card.

1. Run the simulation by varying the velocity from 1m/sec to 5m/sec for at least 3 velocities and discuss the results.
2. Find out the maximum temperature and heat transfer coefficient attained by the processor.
3. Prove that the simulation has achieved convergence with appropriate images and plots.
4. Identify potential hotspots on the model.

Material Properties :

Assuming power consumption by the processor is 85 W

Volume of the processor : 64 mm^3

Heat Generation rate by the processor would be :1328125000 w/m^3

Case : Baseline Mesh

Element Size: 10 mm

Solver Settings:

Convergence Plots:

Contour plots :

Maximum Temperature attained by processor is 541.068 deg C

Case 1 : Velocity :1 m/s

Refined Mesh

Boundary Conditions:

Solver Settings:

Convergence Plots:

Case 2 : Velocity :3 m/s

Convergence Plots:

Contour plots:

Case 3 : Velocity : 5m/s

Convergence Plots:

Contour plots:

To calculate the heat transfer coefficient attained by the processor,Following method has been adopted as

mentioned below:

Q=hA(T2-T1)

where,

T1=Temperature of the surrounding fluid,

T2=Temperature of the solid surface,

Area=160 mm^2

Conclusion :

With reference to above data, it can be said that as the velocity increases, the temperature decreases and vice -versa ,tendency to transfer heat increases..