Mass Transfer Coefficient by Film Theory Calculator

✖The Diffusion Coefficient (DAB) is the amount of a particular substance that diffuses across a unit area in 1 second under the influence of a gradient of one unit.ⓘ Diffusion Coefficient (DAB) [D_AB]			+10% -10%
✖The Film Thickness is the thickness between the wall or the phase boundary or the interface to the other end of the film.ⓘ Film Thickness [δ]			+10% -10%

✖Convective Mass Transfer Coefficient is a function of geometry of the system and the velocity and properties of the fluid similar to the heat transfer coefficient.ⓘ Mass Transfer Coefficient by Film Theory [k_L]

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Mass Transfer Coefficient by Film Theory Solution

STEP 0: Pre-Calculation Summary

Formula Used

Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness
k_L = D_AB/δ
This formula uses 3 Variables

Variables Used

Convective Mass Transfer Coefficient - (Measured in Meter per Second) - Convective Mass Transfer Coefficient is a function of geometry of the system and the velocity and properties of the fluid similar to the heat transfer coefficient.
Diffusion Coefficient (DAB) - (Measured in Square Meter Per Second) - The Diffusion Coefficient (DAB) is the amount of a particular substance that diffuses across a unit area in 1 second under the influence of a gradient of one unit.
Film Thickness - (Measured in Meter) - The Film Thickness is the thickness between the wall or the phase boundary or the interface to the other end of the film.

STEP 1: Convert Input(s) to Base Unit

Diffusion Coefficient (DAB): 0.007 Square Meter Per Second --> 0.007 Square Meter Per Second No Conversion Required
Film Thickness: 0.005 Meter --> 0.005 Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

k_L = D_AB/δ --> 0.007/0.005

Evaluating ... ...

k_L = 1.4

STEP 3: Convert Result to Output's Unit

1.4 Meter per Second --> No Conversion Required

FINAL ANSWER

1.4 Meter per Second <-- Convective Mass Transfer Coefficient

(Calculation completed in 00.004 seconds)

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Mass Transfer Coefficient by Film Theory

LaTeX Go Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness

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Mass Transfer Coefficient by Film Theory Formula

LaTeX Go

Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness
k_L = D_AB/δ

What is Film Theory in Mass Transfer ?

Film theory in Mass transfer states that the resistance in mass transfer between fluid phases in turbulent flow is present in a thin layer adjacent to the interface called film. As per Film Theory (Whitman 1932), the mass transfer coefficient is equal to the ratio of diffusivity to film thickness.

How to Calculate Mass Transfer Coefficient by Film Theory?

Mass Transfer Coefficient by Film Theory calculator uses Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness to calculate the Convective Mass Transfer Coefficient, The Mass Transfer Coefficient by Film Theory formula is used to calculate the mass transfer coefficient based on film theory where diffusivity and film thickness are known. Convective Mass Transfer Coefficient is denoted by k_L symbol.

How to calculate Mass Transfer Coefficient by Film Theory using this online calculator? To use this online calculator for Mass Transfer Coefficient by Film Theory, enter Diffusion Coefficient (DAB) (D_AB) & Film Thickness (δ) and hit the calculate button. Here is how the Mass Transfer Coefficient by Film Theory calculation can be explained with given input values -> 1.4 = 0.007/0.005.

FAQ

What is Mass Transfer Coefficient by Film Theory?

The Mass Transfer Coefficient by Film Theory formula is used to calculate the mass transfer coefficient based on film theory where diffusivity and film thickness are known and is represented as k_L = D_AB/δ or Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness. The Diffusion Coefficient (DAB) is the amount of a particular substance that diffuses across a unit area in 1 second under the influence of a gradient of one unit & The Film Thickness is the thickness between the wall or the phase boundary or the interface to the other end of the film.

How to calculate Mass Transfer Coefficient by Film Theory?

The Mass Transfer Coefficient by Film Theory formula is used to calculate the mass transfer coefficient based on film theory where diffusivity and film thickness are known is calculated using Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness. To calculate Mass Transfer Coefficient by Film Theory, you need Diffusion Coefficient (DAB) (D_AB) & Film Thickness (δ). With our tool, you need to enter the respective value for Diffusion Coefficient (DAB) & Film Thickness and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Convective Mass Transfer Coefficient?

In this formula, Convective Mass Transfer Coefficient uses Diffusion Coefficient (DAB) & Film Thickness. We can use 2 other way(s) to calculate the same, which is/are as follows -

Convective Mass Transfer Coefficient = sqrt(Diffusion Coefficient (DAB)*Surface Renewal Rate)
Convective Mass Transfer Coefficient = sqrt(Diffusion Coefficient (DAB)*Surface Renewal Rate)

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