// multi-utility computation suite · offline · instant · precise
┌──────────────────────────┐
│ [c] calcalyst_ │
│ computation suite │
└──────────────────────────┘
// select a module to initialize
/ search↵ open firstesc close
// adsenseEMPTY_LEADER_SLOT728×90
// adsenseMOBILE_ANCHOR_SLOT320×50
// keyboard_shortcuts
/focus search
↑↓navigate module list
Enter
open first result from search
open highlighted
compute when module is open
compute when focused in a field
Escclose module · clear selection
⌫
sci.fin-efficiency-rectangular Calculator
Calculates rectangular fin efficiency η_f = tanh(mL)/(mL), where m = √(hP/kAc), and the heat transfer enhancement ratio. A fin with mL = 1 has η_f = 76% — beyond mL = 2, efficiency drops below 48%; longer fins add less heat transfer per unit material.
Inputs
L Mm
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
T Mm
Perpendicular measurement through the material. For insulation: thicker is better. For beams: directly affects bending resistance.
K W Mk
How easily heat flows through the material (W/m·K). Metals are high; insulation materials are very low.
H W M2K
Reference formula or conversion factor shown for context.
T Base C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
T Inf C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
fin efficiency η
Useful output divided by total input, as a percentage. True 100% efficiency is impossible — losses appear as heat. LEDs: 30–50%. Electric motors: 85–97%. Switching supplies: 85–95%.
actual heat transfer q_fin (W/m width)
Thermal energy moving from hot to cold. Rate depends on temperature difference, conductivity, and geometry (Fourier's Law for conduction; Newton's Law of Cooling for convection).
maximum possible q_max (W/m)
The largest value in the dataset or feasible range.