Hi RG,
I have the following problem:
Two inlets, one inputing a solution with known concentration and the other inputing a phosphate buffer. The two inlets converge into a single duct (Y junction) with laminar flow with known velocity. I'm looking for an equation (or at least a way to find it) for the concentration at steady-state in a distance X from the junction. Puttint it differently: how long the path needs to be to dilute the two solutions? How unaccurate would be to approximate as a simple 1D diffusion problem, solve it using Fick's law, and estimate the concentration along the way linking the velocity and time?
My setup is a microfluidic system:
Inlet 1: bsa bovine serum albumin (BSA) 4.516e-6 mol/L
Inlet 2: phosphate buffer pH 7
Inlet flow: 0.125 mL/h
Thank you,
Best regards.
Hello Maiara Taniguchi ,
Take a look at the following book,
[1] R. Byron Bird, Warren E. Stewart, Edwin N. Lightfoot; Transport Phenomena; John Wiley & Sons, Inc.; 1960; pp. 220-222 (Example 7.5-2) & 470-471 (Example 15.4-4).
Regards,
Tom Cuff
Hi
My guess is, that it was calculated in the literature before, like Thomas suggested. However, it might be an option to use COMSOL, which is quite common in the area of microfluidics. Maybe the two-phase-flow physics is what you are looking for (microfluidics module). Apart from that, if you want to achieve rapid mixing, you should add a micro mixer to your setup. Otherwise, the mixing is likely to be incomplete at the end of your channel.
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