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Fig. 1 Block Cross-section With A Hole In The Centre

Use the ANSYS simulation software to compute the two-dimensional heat flow inside a steel metallic block with a rectangular-section and a hole at the centre. The simulations are to be carried out using a FINE mesh for the computational domain with additional mesh refinement if necessary.

Use Table 1 to determine the Left Edge temperature, ambient temperature at the Right Edge and in the hole at the centre; and the film heat transfer coefficient on the Top Edge and surface of the hole.

Table 1 Temperature & Film Heat Transfer Coefficient

Use Table 2 to determine the dimensions of the block. The hole is located at the centre of the block cross-section.

Table 2 Block Dimensions

You are required to conduct 2 simulations:

(a) In the first simulation, use the parameters given in Tables 1 & 2.

(b) For the second simulation, change the following parameters:

3 i. Hole Film Heat Transfer Coefficient – 50W/m2 .K

ii. Top Edge Film Heat Transfer Coefficient – 10 W/m2 .K

iii. Bottom Edge Film Heat Transfer Coefficient – 0 W/m2 .K

Report Requirements

Submit a formal report with the following.
(a) Mesh Generated (10 marks)
– Explain the adequacy of the mesh generated and improvements made (withmesh refinement) showing more nodes around regions of rapid temperature change.

Indicate how many refinements were performed.

(b) Temperature Prediction In First Simulation
– Contour plot of temperature (10 marks)
– Use a diagram to indicate the boundary conditions (5 marks)
– Describe the temperature distribution in the block (5 marks)

(c) Temperature Prediction In Second Simulation
– Contour plot of temperature (10 marks)
– Use a diagram to indicate the boundary conditions (5 marks)
– Describe the temperature distribution in the block (5 marks)

(d) Discussions
– Compare the results between the first and second simulation and indicate areas where the temperature distribution is different (5 marks).
– Discuss how the heat distribution is affected by:

 Top edge film heat transfer coefficient (5 marks)
 Bottom edge film heat transfer coefficient (5 marks)
Hole film heat transfer coefficient (5 marks)
– Discuss how the hole size relative to the block height affects the heat conducted

– Perform further simulations to substantiate your findings on the impact of hole size

(e) Report format and presentation (10%)
– You may use any report format you deem appropriate.

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