Tutorial Part1 Ex6 - Heat 2

MARC Designer Tutorial Part 1 Example 6 One-Dimensional Steady-State Heat Transfer Analysis Problem Statement: A hot gas flows through a long tube as shown in Figure E6-1. The inner osurface of the tube is assumed to be heated to the gas temperature of 250 C. The outer surface of othe tube is assumed to be maintained at 25 C. The tube is made of an isotropic material with o 3 othermal conductivity of 6.5 W/m C (or 6.5 x 10 W/mm C). The long tube with uniform temperature at its internal surface can be analyzed using plane strain condition. Due to the symmetry in both geometry and loading about the x- and y- axes, we only need to consider a quadrant of the tube as our finite element model. We wish to determine the temperature distribution across the wall of the tube when the heat transfer is at a steady-state condition, using MARC Designer software. A thick-walled tube: Internal radius, r = 150 mm, i Wall thickness, t = 100 mm A hot gas ato250 C Figure E6-1 A hot gas flows through a long tube. Start MARC Designer. Select STEADY-STATE HEAT TRANSFER from the menu. 1. MESH GENERATION (MESH GENERATION) ELEMENT CLASS: QUAD(4); RETURN; CURVE TYPE: CENTER/POINT/POINT; RETURN; SURFACE TYPE: RULED; RETURN; (COORDINATE SYSTEM) RECTANGULAR [Note that the coordinate system changes to CYLINDRICAL coordinate]; GRID [To display the grid points on screen]; SET: (GRID) SPACING: Type 50, Enter; Type 50, Enter; SIZE: Type 250, Enter; Type ...