Lewis Number Calculator

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✖Heat diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.ⓘ Heat Diffusivity [Hd]			+10% -10%
✖Mass diffusivity is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species.ⓘ Mass Diffusivity [Md]			+10% -10%

✖The Lewis Number is a dimensionless number defined as the ratio of thermal diffusivity to mass diffusivity.ⓘ Lewis Number [L_e]

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Lewis Number Solution

STEP 0: Pre-Calculation Summary

Formula Used

Lewis Number = Heat Diffusivity/Mass Diffusivity
L_e = Hd/Md
This formula uses 3 Variables

Variables Used

Lewis Number - The Lewis Number is a dimensionless number defined as the ratio of thermal diffusivity to mass diffusivity.
Heat Diffusivity - (Measured in Square Meter Per Second) - Heat diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure.
Mass Diffusivity - (Measured in Square Meter Per Second) - Mass diffusivity is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species.

STEP 1: Convert Input(s) to Base Unit

Heat Diffusivity: 0.5 Square Meter Per Second --> 0.5 Square Meter Per Second No Conversion Required
Mass Diffusivity: 0.0005 Square Meter Per Second --> 0.0005 Square Meter Per Second No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

L_e = Hd/Md --> 0.5/0.0005

Evaluating ... ...

L_e = 1000

STEP 3: Convert Result to Output's Unit

1000 --> No Conversion Required

FINAL ANSWER

1000 <-- Lewis Number

(Calculation completed in 00.015 seconds)

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Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

Nishan Poojary has created this Calculator and 600+ more calculators!

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Lewis Number Formula

Lewis Number = Heat Diffusivity/Mass Diffusivity
L_e = Hd/Md

What is Convection?

Convection is the process of heat transfer by the bulk movement of molecules within fluids such as gases and liquids. The initial heat transfer between the object and the fluid takes place through conduction, but the bulk heat transfer happens due to the motion of the fluid.

How to Calculate Lewis Number?

Lewis Number calculator uses Lewis Number = Heat Diffusivity/Mass Diffusivity to calculate the Lewis Number, The Lewis number formula is 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. Lewis Number is denoted by L_e symbol.

How to calculate Lewis Number using this online calculator? To use this online calculator for Lewis Number, enter Heat Diffusivity (Hd) & Mass Diffusivity (Md) and hit the calculate button. Here is how the Lewis Number calculation can be explained with given input values -> 1000 = 0.5/0.0005.

FAQ

What is Lewis Number?

The Lewis number formula is 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 and is represented as L_e = Hd/Md or Lewis Number = Heat Diffusivity/Mass Diffusivity. Heat diffusivity is the thermal conductivity divided by density and specific heat capacity at constant pressure & Mass diffusivity is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species.

How to calculate Lewis Number?

The Lewis number formula is 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 is calculated using Lewis Number = Heat Diffusivity/Mass Diffusivity. To calculate Lewis Number, you need Heat Diffusivity (Hd) & Mass Diffusivity (Md). With our tool, you need to enter the respective value for Heat Diffusivity & Mass Diffusivity and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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