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Week # 5 MR Chapter 6 Fluid Flow Through a Packed Bed of Particles

Tutorial # 5 MR #6.1, 6.3, 6.5, 6.7, To be discussed on Feb. 19, 2020. By either volunteer or class list. Week # 5 MR Chapter 6 Fluid Flow Through a Packed Bed of Particles.

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Week # 5 MR Chapter 6 Fluid Flow Through a Packed Bed of Particles

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  1. Tutorial # 5 MR #6.1, 6.3, 6.5, 6.7, To be discussed on Feb. 19, 2020. By either volunteer or class list. Week # 5MR Chapter 6Fluid Flow Through a Packed Bed of Particles MARTIN RHODES (2008) Introduction to Particle Technology , 2nd Edition. Publisher John Wiley & Son, Chichester, West Sussex, England.

  2. Hagen-Poiseuille: Tube equivalent diameter: Pressure drop-flow relationship Laminar flow: Darcy (1856) Flow area = eA; wetted perimeter = SBA; SB: Particle surface area per unit volume of the bed. Total particle surface area in the bed = SBAH For packed bed, wetted perimeter = SBAH/H = SBA

  3. Carmen-Kozeny eq.: A Sv = 6/x Turbulent flow:

  4. General equation for turbulent and laminar flow Ergun eq.

  5. Non-spherical particles Friction factor versus Reynolds number plot for fluid flows through a packed bed of spheres

  6. Filtration • Incompressible cake (From Ergun equation) The volume of cake formed by the passage of unit volume of filtrate. (Eq. 6.21, See Appendix 5 for derivation )

  7. (Eq. 6.23, see Appendix 5 for derivation ) • Including the resistance of the filter medium • Constant pressure drop filtration (Eq. 6.27, see Appendix 5 for derivation )

  8. Washing the cake Removal of filtrate during washing of the filter cake

  9. Compressible cake rc = rc(ps) Analysis of the pressure drop-flow relationship for a compressible cake

  10. xsv = 792 mm.

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