Heisler Calculator is a professional quality evaluation tool that quickly calculates internal temperatures for transient heat conduction through a 1-D plane wall of thickness 2*L. No more Heisler Charts! Heisler Calculator provides an accurate numerical solution, eliminating the need for tedious graphical results from Heisler charts.

Heisler Calculator allows inputs in either SI (metric) units I-P (English) units, and converts from one to the other.

The User Inputs:

• x (the spatial location in the plane wall, measured from the centerline)

• L (2L is the wall thickness)

• t (the elapsed time since the step change in surroundings temperature)

• h (the convective heat transfer coefficient)

• k (the thermal conductivity of the wall material)

• α (the thermal diffusivity of the wall material)

• Ti (the initial uniform temperature of the wall)

• T∞ (the constant surroundings temperature far from the wall)

Heisler Calculator Outputs:

• x* (dimensionless distance from the center)

• Fo (the Fourier Number, dimensionless time)

• Bi (the Biot Number, dimensionless convective heat transfer coefficient)

• θ* (dimensionless Temperature, =(T-T∞)/(Ti-T∞))

• T (temperature at x at time t)

Limitations:

• the wall is initially at uniform temperature

• the temperature of the surroundings and the convective heat transfer coefficient are constant and uniform

• no heat generation inside the wall

• the Fourier number (αt/(L^2)) must be > 0.0001

• the wall and surroundings are symmetric around the wall centerline

If you have a question or suggestion, please email heislercalc@blumtnwerx.com

Supported Devices:

- iPad

- iPhone

- iPod Touch