C16_Component_Transfer_Mechanisms

C16_Component_Transfer_Mechanisms - Mass Transfer...

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1 Mass Transfer Mechanisms of Components Phase and component mass transfer Equation of continuity: total mass of a phase () ()() . . . t ρ =− ∇ =− + ⎡⎤ ⎣⎦ u uu Single phase, 2 components, homogenous component distribution A phase containing more than one component Define the mass fractions of component A and B AB mm ωω == ++ A u A u u The convective mass fluxes of A and B, respectively A AA A B BB B ωρ ω
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2 Mass Transfer Mechanisms of Components Phase and component mass transfer Single phase, 2 components, homogenous component distribution Single phase, 2 components, inhomogeneous component distribution A u A u u For a homogeneous distribution of A and B in the phase (uniform mixture), the average velocity of A, u A , and B, u B , (averaged over a tiny phase volume,) are the same as the phase velocity u AB == uuu AA B BB A B B ω ρ ρρ += + = = + u uu u u A phase containing more than one component Phase velocity is the mass average velocity
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3 Mass Transfer Mechanisms of Components Phase and component mass transfer Single phase, 2 components, homogenous component distribution Single phase, 2 components, inhomogeneous component distribution
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C16_Component_Transfer_Mechanisms - Mass Transfer...

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