mixing of the immiscible liquids in the entrance region of a t-type chamber using laser induced fluorescence (lif) method

A laser induced fluorescence technique (lif) has been used to study the mixing behavior of two emerging streams in a t-type mixing chamber. a mixing index on the basis of digital image light intensities is calculated. it has been shown that averaging over more than 800 images leads to a stable mixing index calculation. moreover, the effect of equal and un-equal flow rates on the mixing behavior of the streams has been studied. the results show that the histograms of the light intensity changes from double peak (unmixed) to a single peak (mixed) at high elevations of the chamber. mixing index has a linear descending behavior moving toward the cell front wall and it was shown that the mixing index can be reduced up to 50% moving from cell center to near wall region. moreover, there is a transition zone in both equal and un-equal fluid flow rates in mixing index. it was shown that the third component velocity play an important role in mixing behavior in t-type mixing chamber.