Design of an asymmetrical flow field-flow fractionation cell with both mean channel and membrane velocities constant.
We consider an asymmetric flow-field-flow fractionation (FFF) cell with an exponential variation of the channel breadth and a hydraulic conductivity gradient membrane to get a constant efficiency of the separation process over the whole length of the channel. After presenting the model for a membrane of constant hydraulic conductivity, we determine the dependence of conductivity with distance to entrance to get both mean channel and membrane velocities constant.
Déjardin
P
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Institut Européen des Membranes, Université Montpellier 2 (ENSCM, UM2, CNRS), CC047, 2 Place Eugène Bataillon, F-34095 Montpellier Cedex 5, France. dejardin@iemm.univ-montp2.fr
D031521:Fractionation, Field Flow / Q000295:instrumentation*; D008433:Mathematics