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THE FEUTEX TOOLKIT

Composite Wall Heat Flow

Combine two solid layers and surface convection into total heat transfer.

Thermal workspace● Runs in your browser
01 Your input
02 Your result
View or copy raw result data
FormulaR″=1/hi+L₁/k₁+L₂/k₂+1/ho; Q=AΔT/R″.
Sources and model references

How to use this tool

  1. Enter every input in the labeled units; use measured or independently specified properties.
  2. Check the stated model assumptions before calculating.
  3. Interpret the output as a model estimate and verify it independently for the intended application.

Try this example

{
  "l1": 0.1,
  "k1": 1,
  "l2": 0.05,
  "k2": 0.05,
  "hi": 10,
  "ho": 20,
  "area": 10,
  "delta": 20
}

Accuracy and scope

One-dimensional steady conduction, constant properties, no thermal bridges or moisture effects. Educational engineering estimate only; not structural or safety certification, equipment selection, or operating recommendations.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.