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Lewis Number Using Thermal Diffusivity

The Lewis number is a dimensionless number defined as the ratio of thermal diffusivity to mass diffusivity. It is used to characterize fluid flows where there is simultaneous heat and mass transfer.

The Lewis number equals the thermal diffusivity divided by the diffusion coefficient

Formula

QuantityVariable["Le", "LewisNumber"] == QuantityVariable["α", "ThermalDiffusivity"]/QuantityVariable["D", "DiffusionCoefficient"]

symbol description physical quantity
Le Lewis number "LewisNumber"
D diffusion coefficient "DiffusionCoefficient"
α thermal diffusivity "ThermalDiffusivity"

Forms

Examples

Get the resource:

In[1]:=
ResourceObject["Lewis Number Using Thermal Diffusivity"]
Out[1]=

Get the formula:

In[2]:=
FormulaData[ResourceObject["Lewis Number Using Thermal Diffusivity"]]
Out[2]=

Use some values:

In[3]:=
FormulaData[ ResourceObject[ "Lewis Number Using Thermal Diffusivity"], {QuantityVariable[ "\[Alpha]","ThermalDiffusivity"] -> Quantity[1, ("Meters")^2/("Seconds")], QuantityVariable["Le","LewisNumber"] -> 1}]
Out[3]=

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