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eng.heat-pipe-transport-limit Calculator
Calculates heat pipe thermal transport limit (capillary, boiling, entrainment) and effective thermal conductance from working fluid and geometry. Heat pipe effective thermal conductivity can be 1,000–10,000× that of copper — they're used in electronics cooling and spacecraft thermal control.
Inputs
R Vapor Mm
Distance from centre to edge of a circle. Radius = diameter / 2.
L Effective M
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
T Op C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Fluid
Reference formula or conversion factor shown for context.
Results
vapour core area A_v (mm²)
The computed two-dimensional surface area.
sonic limit estimate Q_sonic (W)
The value at the specified point or condition.
viscous limit Q_viscous (W)
Reference formula or conversion factor shown for context.
estimated transport limit (W)
The value at the specified point or condition.
fluid
Reference formula or conversion factor shown for context.