Experimental and computational studies of turbulent mass transfer in a mixing channel
Journal article, Peer reviewed
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OriginalversjonHjertager Osenbroch, Lene K.; Hjertager, Bjorn H.; and Solberg, Tron (2008) "Experimental and Computational Studies of Turbulent Mass Transfer in a Mixing Channel," International Journal of Chemical Reactor Engineering: Vol. 6: A105. Available at: http://www.bepress.com/ijcre/vol6/A105
Experiments are carried out for passive mixing in order to obtain local mean and turbulent velocities and concentrations. The mixing takes place in a square channel with two inlets separated by a block. A combined PIV/PLIF technique is used to obtain instantaneous velocity and concentration fields. Three different flow cases are studied. The 2D numerical predictions of the mixing channel show that none of the k - ε turbulence models tested is suitable for the flow cases studied here. The turbulent Schmidt number is reduced to obtain a better agreement between the measured and predicted mean and fluctuating concentrations. The multi-peak presumed PDF mixing model is tested and comparisons with experiments are encouraging.