Wake Frequency Calculation Excel Sheet |top| Jun 2026

For those cases, consider Python scripts (with pandas and scipy ) or dedicated CFD/FEA software (ANSYS, OpenFOAM, OrcaFlex).

For a cylinder in a cross-flow, the Strouhal number is not constant. It depends on the Reynolds number (( Re )). Therefore, a robust Excel sheet must compute ( Re ) first, then select the appropriate ( S_t ).

Thermowells protect temperature sensors from high velocity, high pressure, and corrosive process fluids. However, flowing fluid exerts dynamic forces that can cause thermowell fatigue failure. Implementing a based on the ASME PTC 19.3 TW standard ensures your piping system remains safe and compliant. 💡 Understanding Thermowell Wake Frequency

The sheet should clearly segregate user inputs from calculation cells. wake frequency calculation excel sheet

Formula for projected diameter: =D_actual / ABS(COS(RADIANS(angle))) (for non-circular sections).

While we cannot provide a direct file, here is the exact layout to reproduce yourself:

This article provides a complete guide to building, using, and validating your own wake frequency calculator in Microsoft Excel. For those cases, consider Python scripts (with pandas

Ensures the natural frequency of the thermowell is high enough that it doesn't resonate with the "wake" (the vortices shed by the fluid).

Vortex-induced cyclic forces must stay below the material fatigue limit.

If ( f ) matches a natural frequency of the structure, resonance (lock-in) can occur, leading to large amplitude vibrations, fatigue damage, or failure. Therefore, a robust Excel sheet must compute (

For water at 20°C: ( \nu = 1.004e-6 , m^2/s ) For air at 20°C: ( \nu = 1.516e-5 , m^2/s )

As these vortices shed alternately from one side of the thermowell to the other, they create a periodic force perpendicular to the flow direction. The frequency at which these vortices shed is called the .