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Author: Rajesh Bhaskaran & Yong Sheng Khoo, Cornell University

Problem Specification
1. Create Geometry in GAMBIT
2. Mesh Geometry in GAMBIT
3. Specify Boundary Types in GAMBIT
4. Set Up Problem in FLUENT
5. Solve!
6. Analyze Results
7. Validate the Results

Step 7: Validate the Results

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Using method taught in Step 6, calculate the Strouhal Number for time steps size of 0.2 and 0.1. Following table summarized summarizes the result.

Time Step Size (s)

0.1

0.2

0.4

Strouhal Number

0.188

0.182

0.172

Difference (%)

3

6

0

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Info
title

Do note that with time step size of 0.1s, we have exceeded the experimental Strouhal value of 0.183. However, we have only investigated the time parameter. We will have to investigate other parameters such as grid convergence, residual, unsteady formulation, etc, before we can conclude on the accuracy of our model.

 

Grid Convergence Investigation

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