Calculator · Thermal Engineering
Fin Efficiency & Heat Transfer
Straight uniform adiabatic-tip fin efficiency, fin parameter and signed heat rate, including the zero-length limit.
Inputs
Results
Heat-transfer rate Q̇
4.3053 W
Surface/base → fluid
| Fin parameter m | 7.0711 m⁻¹ |
|---|---|
| mL | 0.70711 |
| Fin efficiency η | 0.86106 |
Assumptions
- · steady 1D fin
- · constant h and k
- · adiabatic tip
Technical reference
m = √(hP/(kA꜀))
Q̇ = √(hPkA꜀)(Tᵦ − T∞)tanh(mL)
η = tanh(mL)/(mL)
- R
- thermal resistance[K/W]
- Q̇
- signed heat-transfer rate[W]
- k
- thermal conductivity[W/(m·K)]
- h
- prescribed convection coefficient[W/(m²·K)]
Uniform straight fin with adiabatic tip only. Zero length gives Q̇ = 0 and efficiency = 1. Effectiveness is not exposed by the frozen primitive.