Maurice Tutor

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Category > Management Posted 28 Feb 2018 My Price 9.00

heart–lung bypass machine.

A device has been proposed that will serve as a ‘‘blood oxygenator’’ for a heart–lung bypass machine. In this process, blood (which is mostly water, species B) containing no dissolved oxygen (O2 species A) enters the top of the chamber and then falls vertically down as a liquid film of uniform thickness, along a surface designed to appropriately wet blood. Contacting the liquid surface is a 100% O2 gas phase.

Oxygen is soluble in blood, with the equilibrium solubility described by Henry’s law,  is the partial pressure of oxygen (atm), H is the Henry’s law constant, andthe solubility concentration limit of oxygen dissolved in blood (mmol/L) at pA.

In analyzing the mass transport of dissolved oxygen into the falling film, you may assume the following: (1) the process is dilute with respect to dissolved oxygen in the fluid; (2) the falling liquid film has a flat velocity profile with velocity vmax; (3) the gas space always contains 100% oxygen; (5) the width of the liquid film, W, is much larger than the length of the liquid film, L.

a. Simplify the general differential equation for O2 transfer. If your analysis suggests more than one dimension for flux, provide a simplified flux equation for each coordinate of interest.

b. Provide one simplified differential equation in terms of the fluxes and another simplified differential equation in terms of the oxygen concentration cA.

c. List boundary conditions associated with the oxygen mass transfer process.

 

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Maurice Tutor
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Status NEW Posted 28 Feb 2018 08:02 PM My Price 9.00

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