Steady Thermal Conduction
Estimate one-dimensional heat flow across a flat material layer.
Your numbers
Heat flow rate
Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.
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Formula
Use P = kAΔT/L. k is conductivity in W/m·K, A is area in m², ΔT is the signed hot-minus-cold temperature difference in K, and L is thickness in m. Heat flow rate P is in W.
Estimate one-dimensional heat flow across a flat material layer.
Worked example
- Thermal conductivity (W/m·K)
- 0.04
- Layer area (m²)
- 10
- Layer thickness (m)
- 0.1
- Hot minus cold temperature (K)
- 20
- Heat flow rate
- 80 W
Scope and limitations
Idealized SI-unit model for educational estimates. Confirm material properties, boundary conditions and applicability before engineering use.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
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Formula version: cdb9ff0cd5b6 · Example checked: