Embedded Files
Isometric view of the heat exchanger.
Transparent view of the heat exchanger.
Background
Background
This is an assignment for my ME-441 Computer Simulation and Analysis class. In the Computer Simulation and Analysis class ANSYS Workbench and Discovery AIM were used extensively to simulate. Instructions were provided, and sometimes the models, either from Creo Parametric or SolidWorks, were provided as well. Some assignments however need the objects to be modelled from scratch or modified before hand.
The assignment
The assignment
In this assignment, using ANSYS AIM Fluid-Solid Heat Transfer, a conjugate heat transfer analysis is performed on a cross flow heat exchanger. The heat exchanger is made of structural steel. The fluids used in this analysis is water and hot air. For the hot air, the inlet and out goes from left to right in the horizontal tube. For water, the inlet and outlet goes from right to left in the vertical tubes.
When editing the geometry, a volume extraction needs to be down on the pipes. The inlet and outlet faces (not the inside of the pipes) need to be selected before using Select Seed Face tool to select the inside of the pipe. The faces and the inside need to be selected based on the respective fluid flow. When meshing, the boundary layer must be selected on the whole body except for the inlet and outlet faces.
The fluid flow conditions for the air flow has the inlet placed at the left horizontal circular face with a velocity of 1 m/s and a temperature of 327 C. The outlet across has a gauge static pressure of 0 Pa. The fluid flow conditions for water has the inlet placed at the right vertical circular face with a mass flow rate of 0.02 kg/s and a temperature of 20 C. The outlet on the right side has a gauge static pressure of 0 Pa. The rims of inlet and outlet faces have an insulated (or adiabatic) solid thermal boundary condition. The rest of the body has a convection solid thermal condition with a heat transfer coefficient of 5 W/(m^2 * C) and a convection temperature of 15 C. For the structural conditions, fixed supports are applied to the rim faces of the inlets and outlets.
Results
Results
The fluid flow results include an unvalued streamline, velocity vector for the air flow, and velocity, temperature, and pressure contours at various sections of the heat exchanger. The structural results show the von-Mises and displacement magnitude of the heat exchanger.
Boundary conditions for the heat exchanger. From left to right: fluid, thermal, structural.
Streamline of the fluid flows.
Velocity vector for the air flow.
Velocity contour for the vertical mid-plane of the heat exchanger.
Temperature contour at the center of the heat exchanger.
Temperature contour for the vertical mid-plane of the heat exchanger.
Temperature contour at the air flow outlet.
Pressure contour for the vertical mid-plane of the heat exchanger.
Von-Mises stress on the heat exchanger.
Displacement magnitude on the heat exchanger.
Page updated
Report abuse