STROUHAL
Excel Usage
=STROUHAL(f, L, V)f(float, required): Characteristic frequency (usually vortex shedding) [Hz]L(float, required): Characteristic length [m]V(float, required): Velocity of the fluid [m/s]
Returns (float): Strouhal number [-]
Examples
Example 1: Simple example
Inputs:
| f | L | V |
|---|---|---|
| 8 | 2 | 4 |
Excel formula:
=STROUHAL(8, 2, 4)Expected output:
4
Example 2: High velocity flow
Inputs:
| f | L | V |
|---|---|---|
| 10 | 0.5 | 20 |
Excel formula:
=STROUHAL(10, 0.5, 20)Expected output:
0.25
Example 3: Low frequency oscillation
Inputs:
| f | L | V |
|---|---|---|
| 0.5 | 1 | 2 |
Excel formula:
=STROUHAL(0.5, 1, 2)Expected output:
0.25
Example 4: Typical vortex shedding
Inputs:
| f | L | V |
|---|---|---|
| 20 | 0.1 | 5 |
Excel formula:
=STROUHAL(20, 0.1, 5)Expected output:
0.4
Python Code
from fluids.core import Strouhal as fluids_Strouhal
def strouhal(f, L, V):
"""
Calculate the Strouhal number.
See: https://fluids.readthedocs.io/fluids.core.html#fluids.core.Strouhal
This example function is provided as-is without any representation of accuracy.
Args:
f (float): Characteristic frequency (usually vortex shedding) [Hz]
L (float): Characteristic length [m]
V (float): Velocity of the fluid [m/s]
Returns:
float: Strouhal number [-]
"""
try:
f_val = float(f)
L_val = float(L)
V_val = float(V)
if V_val == 0:
return "Error: Velocity must be non-zero"
result = fluids_Strouhal(f_val, L_val, V_val)
return float(result)
except Exception as e:
return f"Error: {str(e)}"