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Mass Transfer Coefficient by Film Theory Formula

GoMass Transfer Coefficient by Surface Renewal Theory Formula

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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. Check FAQs

k L = \frac{D AB}{δ}

k_L - Convective Mass Transfer Coefficient?D_AB - Diffusion Coefficient (DAB)?δ - Film Thickness?

Mass Transfer Coefficient by Film Theory Example

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Here is how the Mass Transfer Coefficient by Film Theory equation looks like with Values.

Here is how the Mass Transfer Coefficient by Film Theory equation looks like with Units.

Here is how the Mass Transfer Coefficient by Film Theory equation looks like.

1.4 = \frac{0.007}{0.005}

1.4m/s = \frac{0.007m²/s}{0.005m}

1.4 = \frac{0.007}{0.005}

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Mass Transfer Coefficient by Film Theory Solution

Follow our step by step solution on how to calculate Mass Transfer Coefficient by Film Theory?

FIRST Step Consider the formula

k L = \frac{D AB}{δ}

Next Step Substitute values of Variables

∴

k L = \frac{0.007m²/s}{0.005m}

Next Step Prepare to Evaluate

∴

k L = \frac{0.007}{0.005}

LAST Step Evaluate

∴

k L = 1.4m/s

Mass Transfer Coefficient by Film Theory Formula Elements

Variables

Convective Mass Transfer Coefficient

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.

Symbol: k_L

Measurement: SpeedUnit: m/s

Note: Value can be positive or negative.

Formulas to find Convective Mass Transfer Coefficient

Diffusion Coefficient (DAB)

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.

Symbol: D_AB

Measurement: DiffusivityUnit: m²/s

Note: Value should be greater than 0.

Formulas to find Diffusion Coefficient (DAB)

Film Thickness

The Film Thickness is the thickness between the wall or the phase boundary or the interface to the other end of the film.

Symbol: δ

Measurement: LengthUnit: m

Note: Value should be greater than 0.

Formulas to find Film Thickness

Other Formulas to find Convective Mass Transfer Coefficient

Go Mass Transfer Coefficient by Surface Renewal Theory

k L = \sqrt{D AB \cdot s}

Other formulas in Mass Transfer Theories category

Go Average Sherwood Number of Combined Laminar and Turbulent Flow

N sh = ((0.037 \cdot ({Re}^{0.8})) - 871) \cdot ({Sc}^{0.333})

Go Average Sherwood Number of Flat Plate Turbulent Flow

N sh = 0.037 \cdot ({Re}^{0.8})

Go Average Sherwood Number of Internal Turbulent Flow

N sh = 0.023 \cdot ({Re}^{0.83}) \cdot ({Sc}^{0.44})

Go Convective Mass Transfer Coefficient

k L = \frac{m a}{ρ a1 - ρ a2}

How to Evaluate Mass Transfer Coefficient by Film Theory?

Mass Transfer Coefficient by Film Theory evaluator uses Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness to evaluate 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 evaluate Mass Transfer Coefficient by Film Theory using this online evaluator? To use this online evaluator for Mass Transfer Coefficient by Film Theory, enter Diffusion Coefficient (DAB) (D_AB) & Film Thickness (δ) and hit the calculate button.

FAQs on Mass Transfer Coefficient by Film Theory

What is the formula to find Mass Transfer Coefficient by Film Theory?

The formula of Mass Transfer Coefficient by Film Theory is expressed as Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness. Here is an example- 1.4 = 0.007/0.005.

How to calculate Mass Transfer Coefficient by Film Theory?

With Diffusion Coefficient (DAB) (D_AB) & Film Thickness (δ) we can find Mass Transfer Coefficient by Film Theory using the formula - Convective Mass Transfer Coefficient = Diffusion Coefficient (DAB)/Film Thickness.

What are the other ways to Calculate Convective Mass Transfer Coefficient?

Here are the different ways to Calculate Convective Mass Transfer Coefficient-

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

Can the Mass Transfer Coefficient by Film Theory be negative?

Yes, the Mass Transfer Coefficient by Film Theory, measured in Speed can be negative.

Which unit is used to measure Mass Transfer Coefficient by Film Theory?

Mass Transfer Coefficient by Film Theory is usually measured using the Meter per Second[m/s] for Speed. Meter per Minute[m/s], Meter per Hour[m/s], Kilometer per Hour[m/s] are the few other units in which Mass Transfer Coefficient by Film Theory can be measured.

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