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  • FLUENT - Unsteady Flow Past a Cylinder - Step 6

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titleCalculating Shedding Frequency

To accurately calculate the shedding frequency, open the cl-history file (saved previously in the same location where the original mesh was read) and plot the data using excel for better data representation and graphing option. Take an average of 10 shedding cycles (e.g 10 CL peak).

Latex
Wiki Markup
{latex}
\large
$$
{\rm{Period}} = {{T_2 - T_1} \over {10}}
$$
{latex}


Latex
Wiki Markup
{latex}
\large
$$
{\rm{f}} = {{1} \over {Period}}$$
{

Latex
}
Wiki Markup
{latex}
\large
$$
{\rm{Sr}} = {fD \over U}
$$
{latex}

An example of Lift Convergence Plot plotted using excel is shown below:

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Higher Resolution Image
https://confluence.cornell.edu/download/attachments/107011458/Excel%20Lift%20convergence.jpg

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