Thermal Diffusivity
α = k/(ρc_p) measures how fast heat spreads. Fourier number Fo = αt/L². Penetration depth δ = √(4αt). Higher α = faster thermal response.
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α = k/(ρc_p) combines k, ρ, c_p Fo = αt/L² dimensionless δ = √(4αt) penetration depth Higher α = faster heat spread
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Why: Thermal diffusivity determines heat treatment times, food freezing rates, and concrete curing.
How: α = k/(ρc_p). Fourier number Fo = αt/L². Penetration depth δ = √(4αt) for semi-infinite solid.
Run the calculator when you are ready.
🔥 Steel Heat Treatment
Calculate thermal diffusivity for steel quenching process
❄️ Food Freezing
Analyze thermal diffusivity for food freezing process
🏗️ Concrete Curing
Determine thermal diffusivity for concrete curing analysis
💻 Semiconductor Processing
Calculate thermal diffusivity for silicon wafer processing
🌍 Geothermal Analysis
Analyze thermal diffusivity for geothermal heat transfer
Thermal Diffusivity Inputs
For educational and informational purposes only. Verify with a qualified professional.
🔬 Physics Facts
α = k/(ρc_p) rate of heat penetration
— Heat Transfer
Fourier number Fo = αt/L²
— Dimensionless Analysis
Penetration depth δ = √(4αt)
— Transient Heat Transfer
τ = L²/α thermal time constant
— Heat Transfer
What is Thermal Diffusivity?
Thermal diffusivity (α = k/(ρcp)) measures how quickly heat spreads through a material. Higher α means faster heat penetration.
How To Use
- Select mode: find α, Fourier number, penetration depth, or time constant
- Enter material properties or select from database
- Click Calculate for results
📚 Official Data Sources
⚠️ Disclaimer: Thermal diffusivity varies with temperature. Use manufacturer data for design.
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