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33 transient_ex1_-_gui[1]

33 transient_ex1_-_gui[1] - University of Alberta ANSYS...

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Transient Thermal Conduction Example Introduction This tutorial was created using ANSYS 7.0 to solve a simple transient conduction problem. Special thanks to Jesse Arnold for the analytical solution shown at the end of the tutorial. The example is constrained as shown in the following figure. Thermal conductivity (k) of the material is 5 W/m*K and the block is assumed to be infinitely long. Also, the density of the material is 920 kg/m^3 and the specific heat capacity (c) is 2.040 kJ/kg*K. It is beneficial if the Thermal - Conduction tutorial is completed first to compare with this solution. Preprocessing: Defining the Problem 1. Give example a Title Utility Menu > File > Change Title... /Title,Transient Thermal Conduction 2. Open preprocessor menu ANSYS Main Menu > Preprocessor /PREP7 University of Alberta ANSYS Tutorials - www.mece.ualberta.ca/tutorials/ansys/IT/TransCond/Print.html Copyright © 2003 University of Alberta
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3. Create geometry Preprocessor > Modeling > Create > Areas > Rectangle > By 2 Corners X=0, Y=0, Width=1, Height=1 BLC4,0,0,1,1 4. Define the Type of Element Preprocessor > Element Type > Add/Edit/Delete... > click 'Add' > Select Thermal Mass Solid, Quad 4Node 55 ET,1,PLANE55 For this example, we will use PLANE55 (Thermal Solid, Quad 4node 55). This element has 4 nodes and a single DOF (temperature) at each node. PLANE55 can only be used for 2 dimensional steady-state or transient thermal analysis. 5. Element Material Properties Preprocessor > Material Props > Material Models > Thermal > Conductivity > Isotropic > KXX = 5 (Thermal conductivity) MP,KXX,1,10 Preprocessor > Material Props > Material Models > Thermal > Specific Heat > C = 2.04 MP,C,1,2.04 Preprocessor > Material Props > Material Models > Thermal > Density > DENS = 920 MP,DENS,1,920 6. Mesh Size Preprocessor > Meshing > Size Cntrls > ManualSize > Areas > All Areas > 0.05 AESIZE,ALL,0.05 7. Mesh Preprocessor > Meshing > Mesh > Areas > Free > Pick All AMESH,ALL At this point, the model should look like the following: University of Alberta ANSYS Tutorials - www.mece.ualberta.ca/tutorials/ansys/IT/TransCond/Print.html Copyright © 2003 University of Alberta
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Solution Phase: Assigning Loads and Solving 1. Define Analysis Type Solution > Analysis Type > New Analysis > Transient ANTYPE,4 The window shown below will pop up. We will use the defaults, so click OK.
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