Oscillatory Flow Mixing

Oscillatory Flow  Mixing (OFM)

The oscillatory flow story started at Sussex University in the late 1970s. I worked with a control engineer, Graeme Knott on wave energy experiments and we discovered that reversing flows around sharp edges generated eddies which was bad for wave energy devices. However, flow separation and therefore eddies could be eliminated by the rounding of edges.

The background to (OFM) is told in a departmental review seminar that I gave at Cambridge in 2010

                                                                Learn More >  OFM-Chem Eng Cambridge 2010 (v2) (.pdf)

A further presentation involving Oscillatory Flow Mixing (OFM) is given below.

                                                                              Learn More >  Strathclyde-2014 (v2) (.pdf)

Papers relevant to Oscillatory Flow are given below.

• G.F.Knott and M.R. Mackley, On eddy motions near plates and ducts, induced by water waves and periodic flows. Phil. Trans. Roy. Soc. (Lond.) V294, 1412, 599-628 (1980).
• M.R.Mackley.
  The application of pulsatile flow to chemical and process engineering.
  The Chemical Engineer. 433, 18-20. February (1987).
• C.R.Brunold, J.C.B. Hunns, M.R. Mackley and J.W. Thompson. Experimental observations on flow patterns and energy losses for oscillatory flow in ducts containing sharp edges. Chem. Eng. Sci.,44, 5, 1227-1244 (1989).
• H.W.Dickens, M.R. Mackley and H.R. Williams. Residence time distributions of oscillatory flows in baffled tubes. Chem. Eng. Sci. 44, 7, 1471-1479, (1989).
• T.Howes and M.R. Mackley. Experimental axial dispersion for oscillatory flow through a baffled tube. Chem. Eng. Sci.. 45, 5, 1349-1358 (1990).
• M.R.Mackley, G.M. Tweddle and I.D. Wyatt. Experimental heat transfer measurements for pulsatile flow in baffled tubes.Chem. Eng. Sci. 45, 5, 1237-1242 (1990).
• T.Howes, M.R. Mackley and E.P.L. Roberts. The simulation of chaotic mixing and dispersion for periodic flows in baffled channels. Chem. Eng. Sci. 46, 7, 1669-1677 (1991).
• M.R.Mackley and X. Ni. Mixing and dispersion in a baffled tube for steady laminar and pulsatile flow.Chem. Eng. Sci., 46, 12, 3139-3151 (1991).
• M.R.Mackley.
  Process innovation using oscillatory flow within baffled tubes.
  Trans I.Chem.E. 69A, 198-199 (1991).
• M.Mackay, M.R. Mackley and Y. Wang.
  Oscillatory flow within tubes containing wall or central baffles.
  Trans I.Chem.E., 69A, 506-513 (1991).
• M.R.Mackley and E.P.L. Roberts.
  Mixing and flow patterns for unsteady flow in baffled channels.
  Generals Papers in Fluid Engineering AIChE. Vol. 127, 57-64 (1991).
• S.Harrison and M.R. Mackley.A pulsatile flow bioreactor Chem. Eng. Sci. 47, 2, 490-493 (1992).
• M.J.Hewgill, M.R. Mackley, A.B. Pandit and S.S. Pannu. Enhancement of gas liquid mass transfer using oscillatory flow in a baffled tube. Chem. Eng. Sci. 48, 4, 799 -809 (1993).
• M.R.Mackley and N.E.Sherman. Cake filtration mechanisms in steady and unsteady flows Journal of Membrane Sci . 77, 113 -121 (1993).
• M.R.Mackley, K.B.Smith and N.P.Wise. The mixing and separation of particle suspensions using oscillatory flow in baffled tubes.
  Trans IChem E, 71A, 649-656 (1993).
• M.R.Mackley and X Ni. Experimental fluid dispersion measurements in periodic baffled tube arrays. Chem Eng Sci. 48,18. 171-178 (1994)