C7_Isothermal_Interphase_Transport_part2

C7_Isothermal_Interphase_Transport_part2 - Interphase...

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Friction factor for packed columns or natural porous media Structure of flow channels of packed columns and natural porous media Interphase Isothermal Momentum Transport
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Friction factor for packed columns or natural porous media A “tube bundle” model for packed columns Define the friction factor for the packed column analogously to that for the tubes D p : effective particle diameter L: column length u 0 : superficial velocity w: total mass flow rate S: empty-column cross section ε : void volume/bed volume also called porosity a: wetted surface/bed volume a v : specific surface R h : hydraulic radius 0 0 2 0 with 1 41 2 p L D PP w fu L uS ρ ⎛⎞ == ⎜⎟ ⎝⎠ The pressure drop through a representative non- circular tube in the tube bundle model 2 0 1 2 L tube h L u f R −= 3 31 2 f f ε ⇒= () with and 6 1 hv vp Ra aa D = Interphase Isothermal Momentum Transport
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Friction factor for packed columns or natural porous media A “tube bundle” model for packed columns 1. Laminar flow 3 0 17 5
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This note was uploaded on 09/01/2011 for the course PGE 312 taught by Professor Peters during the Fall '08 term at University of Texas at Austin.

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C7_Isothermal_Interphase_Transport_part2 - Interphase...

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