STEPS BY STEPS FOR THREE-DIMENSIONAL ANALYSIS USING ABAQUS STEADY-STATE HEAT TRANSFER ANALYSIS

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1 UNIVERSITI MALAYSIA PERLIS FACULTY OF ENGINEERING TECHNOLOGY DEPARTMENT OF MECHANICAL ENGINEERING TECHNOLOGY PDT348 FINITE ELEMENT ANALYSIS Semester II 2017/2018 STEPS BY STEPS FOR THREE-DIMENSIONAL ANALYSIS USING ABAQUS STEADY-STATE HEAT TRANSFER ANALYSIS

2 General Steps to Conduct an Analysis for Three-Dimensional Problem Steady-State Heat Transfer Analysis 1) Part Modelling 2) Material Properties Assignment Thermal/Conductivity 3) Section Assignment 4) Assembly Assignment 5) Steps of Loading Assignment Heat Transfer/Steady-State 6) Boundary Conditions Assignment Other/Temperature (if any) 7) Loads Assignment Surface or Body Heat Flux 8) Mesh Development 9) Interaction Properties Assignment (for heat convection, if any) 10) Analysis 11) Results

General Steps to Conduct an Analysis for Three-Dimensional Problem Steady-State Heat Transfer Analysis Problem 1 Figure P1 depicts a multiview orthographic projection drawing of fins.

3 General Steps to Conduct an Analysis for Three-Dimensional Problem Steady-State Heat Transfer Analysis Problem 1 Figure P1 depicts a multiview orthographic projection drawing of fins. The fins or heat sink is made of aluminium and used to cool down a microprocessor. Given, the thermal conductivity, k of aluminium is 0.17 W/mmK. When the microprocessor is operating, the bottom surface of the heat sink is exposed to a constant heat flux, q of W/mm 2. Forced air flow from a cooling fan over the developed surface maintains the surrounding surface at 323 K. The convective heat transfer coefficient, h between the fin and the ambient surrounding is 80 x 10-6 W/mm 2 K. Predict the temperature distribution within the developed surfaces of the fin. Figure P1

4 STEP 1: Create the Geometrical Parts using SolidWorks.

5 1) Assemble all individual parts together using Mate features in SolidWorks (if any). 2) Save the part as Fin in.sat format.

6 STEP 2: Import the Geometrical Parts from SolidWorks (.sat format) into Abaqus.

7 1) Click File. 2) Select Import. 3) Select Part.

8 4) Select the part file that you have saved in.sat format. 5) Click OK.

9 6) Select Create individual parts. 7) Click OK.

10 8) The part of will appear under the Parts tree.

11 STEP 3: Set the Material Properties of the all parts.

12 1) Select Materials. 2) Put the name of material as Aluminium. 3) Select Thermal/Conductivity.

13 4) Insert the value of conductivity for steel as ) Click OK.

14 STEP 4: Set the Sections of the parts.

15 1) Create Sections for each material. 2) In this case, name the first section as Section-1-Aluminium. 3) Select Solid for Category. 4) Select Homogeneous for Type. 5) Click Continue.

16 6) Select Aluminium for Material. 7) Click OK.

17 STEP 5: Set the Section Assignments to all parts.

18 1) Double click Section Assignments for Fin. 2) Select the whole body of Fin. 3) Click Done.

19 4) Select Section-1-Aluminium. 5) Click OK.

20 6) The part (Fin) will turn into light green colour if Section Assignments has been done.

21 STEP 6: Set the Assembly of the parts.

22 1) Double click Instances. 2) Select Parts. 3) Select Dependent (mesh on part). 4) Select the part to be instanced, i.e Fin for this case. 5) Click OK.

23 6) Make sure all parts of the object have been instanced. You may check them under the Instances tree as shown.

24 STEP 7: Set the Steps of loading.

25 1) Double click Steps to create a new step. 2) Rename the step as Heat Transfer. Select General for Procedure type. 3) Select Heat transfer. 4) Click Continue.

26 5) Click Basic tab. 6) Check Responses as Steady-state. 7) Click Dismiss. 8) Click OK.

27 STEP 8: Set the Boundary Conditions of the parts.

28 1) Double click BCs. 2) Set the name. The name of boundary condition is mainly depending on the types of boundary condition of your object has. 3) Set Step as Heat Transfer. 4) Select Temperature for Types for Selected Step. 5) Click Continue. Since this example has no specified temperature at any locations, so this step is ignored.

29 STEP 9: Set the Loads applied on the part.

30 1) Double click Loads. 2) Set the name as Heat Flux. 3) Set Step as Heat Transfer. 4) Select Surface heat flux for Types for Selected Step. 5) Click Continue.

31 6) Use Rotate View icon to select the surface of the part (Fin) to be applied with heat flux. 7) Click Done.

32 8) Set the magnitude of heat flux as ) Click OK.

33 10) The surface of the part that had been successfully applied with the heat flux will look as shown.

34 STEP 10: Set the Mesh of the parts.

35 1) Expand Parts tree. 2) Double click Mesh (Empty) for Fin. 3) Select Mesh menu. 4) Click Element Type.

36 5) Select the whole part of Fin. 6) Click Done.

37 7) For Family, select Heat Transfer. 8) Click OK. 9) Click Done.

38 10) Go to Mesh tab, select Controls.

39 11) For Element Shape, select Tet. 12) Click OK. 13) Click Done.

40 14) Click Seed Part icon. 15) Set the Approximate global size as ) Click OK.

41 17) Click Mesh Part icon. 18) Click Yes.

42 19) The meshed part will look as shown.

43 STEP 11: Set the Interaction properties of all parts.

44 1) Double click Interactions. 2) Set the name as Outer Surfaces. 3) Set Step as Heat Transfer. 4) Select Surface film condition. 5) Click Continue.

45 6) Click Apply Front View icon.

46 7) Drag a box across the screen to pick all surfaces above the base surface. Ensure that all surfaces are selected except the base. 8) Click Done.

47 9) Insert the convective heat transfer coefficient of 80 x 10-6 W/mm 2 K at Film coefficient. 10) For Sink Temperature, insert 323 K. 11) Click OK.

48 STEP 12: Run the analysis.

49 1) To run the analysis, create Jobs first. Double click Jobs. 2) Set the name as Lab7-Q12. 3) Click Continue.

50 4) Click OK.

51 5) Expand Jobs (1). 6) Right click Lab7- Q2. 7) Select Data Check.

52 8) If there is no error, you may find a status of Job Lab7-Q2 completed successfully appears at the bottom of software s interface.

53 9) Right click Lab7-Q2 (Checked Completed) and select Submit. We are now about to run the analysis.

54 10) If there is no errors, the parts will successfully be analysed as shown in the model tree and status bar.

55 STEP 13: View the results.

56 1) Click Plot Contours on Deformed Shape icon to view the results of analysis.

57 2) There are two common result types presented for steady-state heat transfer analysis HFL (Heat Flux) and NT11 (Temperature).

Abaqus/CAE Heat Transfer Tutorial

Abaqus/CAE Heat Transfer Tutorial Problem Description The thin L shaped steel part shown above (lengths in meters) is exposed to a temperature of 20 o C on the two surfaces of the inner corner, and 120