Carnegie Mellon

Mechanical Engineering

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FEM/ANSYS

## Test T1: Heat Conduction within a Solid

 Thermal Test #1: 2D Heat Conduction within a Solid   Introduction: In this example you will test your 2D heat transfer skills by modeling an object subjected to varying boundary conditions.  Using ANSYS will allow you to output the temperature distribution in an extremely simple and accurate way. Problem Description: ·         We assume that our pan is circular made entirely of steel. ·         All units are S.I. ·         Boundary Conditions:             1) The top and sides have temperature boundary layers of 100 C.             2) The bottom has a temperature boundary layer of 200 C due to the fire . ·         Material Properties: (Steel and Fish)     kFish = 0.5 W/m K           KSteel = 20 W/m K ·         Objective: To determine the nodal temperature distribution and create a contour plot of the temperature gradient within the water. ·         Figure: The GrillPro Fish Grilling Basket   Dimensions:             Outer Layer of the Basket:     30 cm wide, 5 cm tall The basket is 0.005m thick and the fish is assumed to fill the entire area inside the basket with no contact resistance.   ·         Create the larger area defining the steel bars forming the metal section of the “Fish Basket”, then create the area defining the fish within the basket. ·         Overlap the two areas so that there is no contact resistance between them. ·         Define the Material Properties of the Air Element (Thermal Conductivity for each layer needs to be set.) ·         Define the Element Properties as two Quad 8node 77 thermal solids. ·         Mesh the figure with a mesh size of 0.01 on all the lines defining the basket and the fish cross-section within it. (Be sure to mesh each material separately such that the material properties are set independently of each other.) ·         Apply Boundary Conditions (Constant temperatures on all 4 sizes.) ·         Solve ·         List the nodal temperature distribution in the X and Y directions, below is the answer you should obtain. ·         Plot the nodal temperature distribution in the X and Y directions, below is the answer you should obtain:   (The listed nodal temperatures should be as follows:)   (The temperature distribution will look like this:)