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  • FLUENT - Unsteady Flow Past a Cylinder - Step 5

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titleCalculating Shedding Frequency
Wiki Markup

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 C
L 
{~}L~ peak).

Period = (T2-T1)/10
f = 1/Period
Sr = f*D/U
An example of Lift Convergence Plot plotted using excel is shown below:
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Higher Resolution ImageHigher Resolution Image


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

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

{latex}
\large
$$
{\rm{Sr}} = {fD \over U}
$$
{latex}
\\
An example of Lift Convergence Plot plotted using excel is shown below:
\\  !Excel Lift convergence_sm.jpg!\\
{newwindow:Higher Resolution Image}https://confluence.cornell.edu/download/attachments/107011456/Excel%20Lift%20convergence.jpg{newwindow}\\
\\
\\
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