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Defining a barycenter velocity in the model
Posted 2019年2月8日 GMT-5 06:11 Fluid & Heat, Microfluidics, Equation-Based Modeling Version 5.4 1 Reply
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Hi all I am using fluid-structure-interaction(fsi) interface to simulate a microfludic device,which allows cells flowing through the channel.
As the length of the channel is not very important for my simulation(what is important for my simulation is the final steady-state of cell), I want to keep the cell in the center of the fluid domain.
I read some paper which define a barycenter cell velocity, so movement of all quantities (fluid, cell) is considered to relative to the barycenter velocity.
The problem is that this barycenter velocity should be a time-dependent velocity calculated from each step and cannot be pre-defined. Can anybody give me some clues on how to define a barycenter velocity of cell?
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All the reference systems, Hittorff, barycentric, Fickian are essentially the same unless the solute concentrations are very high, of the molality order of > 1. I would not expect too much error in your calculations if you just use the solvent velocity as the reference (= Hittorff reference). All the transport quantities are actually defined (and thus measured) in the Hittorff reference frame.
Lasse