Bernoulli kinetic term
Dynamic pressure
Inputs
Free-stream or mean-duct density at the stated condition.
Free-stream or mean duct speed.
Results
Dynamic pressureq
245
q = ½ ρ V²
A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.
Nearby: Hydrostatic pressure · Flow continuity · Pipe mean velocity · Bernoulli equation
Method
Formula, when it applies, and when it does not
Calculate Bernoulli dynamic pressure from density and speed as a wind or duct screen.
q = ½ ρ V²
When
- Incompressible
- Uniform density
- Speed is the free-stream or mean duct speed
Don’t
- This is the kinetic term ½ρV². It is not a stagnation temperature, not a drag load, and not a code wind pressure.