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Diffusion Coefficient (DAB) in Heat and Mass Transfer Formulas

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. And is denoted by D. Diffusion Coefficient (DAB) is usually measured using the Square Meter Per Second for Diffusivity. Note that the value of Diffusion Coefficient (DAB) is always positive.

Heat and Mass Transfer formulas that make use of Diffusion Coefficient (DAB)

fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Mole Fractions of A​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Partial Pressure of A​Go
fxMolar Flux of Diffusing Component A for Equimolar Diffusion with B based on Mole Fraction of A​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Mole Fractions of A and LMPP​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Mole Fractions of A and LMMF​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Partial Pressure of B​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Concentration of A​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Log Mean Partial Pressure​Go
fxMolar Flux of Diffusing Component A through Non-Diffusing B based on Mole Fractions of B​Go
fxMolar Flux of Diffusing Component A for Equimolar Diffusion with B based on Partial Pressure of A​Go

FAQ

What is the 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. Diffusion Coefficient (DAB) is usually measured using the Square Meter Per Second for Diffusivity. Note that the value of Diffusion Coefficient (DAB) is always positive.
Can the Diffusion Coefficient (DAB) be negative?
No, the Diffusion Coefficient (DAB), measured in Diffusivity cannot be negative.
What unit is used to measure Diffusion Coefficient (DAB)?
Diffusion Coefficient (DAB) is usually measured using the Square Meter Per Second[m²/s] for Diffusivity. Square Centimeter Per Second[m²/s], Square Millimeter per Second[m²/s] are the few other units in which Diffusion Coefficient (DAB) can be measured.
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