Author: Rajesh Bhaskaran & Yong Sheng Khoo, Cornell University
Problem Specification
1. Pre-Analysis & Start-Up
2. Geometry
3. Mesh
4. Physics Setup
5. Numerical Solution
6. Numerical Results
7. Verification & Validation
Exercises
Comments
Pre-Analysis & Start-Up
Since the pipe cross-section is circular and heat is applied in an axisymmetric manner, we'll assume that the flow is axisymmetric. In cylindrical polar coordinates, this means that the flow variables depend only on the axial coordinate x and radial coordinate r, and are independent of the azimuthal coordinate θ. Hence we can model the pipe problem with a rectangular domain.
Here R = radius of the pipe, and L = length of the pipe. Rotating the above rectangle 360 degrees about the axis will recover the full pipe geometry.The radial direction is labeled as y in FLUENT.
Introduction
Verification and Validation Definition
Pre-Analysis Overview
Domain
k-epsilon Turbulence Model
Boundary Conditions
Numerical Solution Procedure
Start ANSYS FLUENT
This tutorial is specially configured, so the user can have both the tutorial and ANSYS open at the same time as shown below. It will be beneficial to have both ANSYS and your internet browser displayed on your monitor. Your internet browser should consume approximately one third of the screen width while ANSYS should take the other two thirds. You can use the windows command Alt + Tab to switch screens.
We'll run FLUENT within the ANSYS Workbench interface. Start ANSYS workbench:
Start > All Programs > ANSYS 14.5 > Workbench
The following figure shows the workbench window.
Note to Cornell students enrolled in MAE 4272: You can skip the geometry and mesh steps. Download the mesh by right clicking here and saving the zip file to a convenient location. Unzip the downloaded file (you cannot read in the zip file directly). After unzipping, you should see a file called pipe_flow.wbpj and a folder called pipe_flow_files. Read the mesh into Workbench using File > Open. Browse to the pipe_flow.wbpj file and double-click on it. Then skip to Step 4: Setup (Physics).