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Homework Assignment #12 March 17, 2017

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For HW12 work these problems 5.26, 5.37,  5.48, 5.49, 5.50 (use a tube diameter of 0.2 cm instead of the given value of 1 cm). This assignment is  due on March 29th.

Homework Assignment 00 – Updated March 15, 2017

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homework3Here is homework assignment #00 which is due on March 24th;   HW00

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Chapter 5 Lecture Slides February 20, 2017

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Here are some additional notes on some stuff we will be talking about from Chapter 5; notes about film theory Film Theory , here is some info on Example 5.7 and Notes on Example 5.7 , and here is stuff regarding the derivation and solution of equation 5.35 , noteseqn5.35 . Also here are additional details on solving Equation 5.37, noteseqn5.37 .  Mass transfer in a rectangular conduit which is similar to the analysis shown in Example 5.10 for a tube of arbitrary cross section, Mass Transfer in a Parallel Plate Channel . Also here is another example that builds on Example 5.10, example5.10addition . Here is some info on the derivation of equations 5.5 and 5.49 equations5.5and5.59 . Some additional notes on Figure 5.9 Notes on Fig. 5-9 Here are some additional notes on problem 5.11 Notes Prob. 5.11 . Here is the Matlab solutions for Example 5.15, example5.15 and example5.15part2 . A figure for gas diffusion into a falling liquid film, figure-5-5

Corrections to Basic Transport Phenomena in BME, 3rd Edition September 11, 2015

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Here are some corrections for the textbook (updated on March 23, 2015), Errata for Basic Transport Phenomena in BME

Homework Assignment #11 March 1, 2017

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Here is HW #11  due on March 17th:

1. A drug has an equilibrium solubility in water of 0.0025 g cm^-3. The diffusivity of the drug in water is 0.9 x 10^-5 cm2/sec. The drug is made into particles that have a radius of 0.1 cm and these particles have a density of 1.27 g/cm^3. These particles are all of the same size and are gently mixed in water in a stirred vessel. Estimate the length of time in hours (hrs) that it will take for these drug particles to completely dissolve. You can assume that the vessel volume is so large that the concentration of the drug in the bulk liquid is very small in comparison to the drug solubility. Also since the particles are all the same size, the time to dissolve is the same for all the particles. So we can focus on just one particle and write an unsteady mass balance on that particle, i.e., d(ρV)/dt = – 4πR^2 km (Csurface – 0) , where V is the particle volume and equals 4/3 πR^3 .

2. In chapter 5, also work problems 23, 42, and 45.

Tutoring Opportunity March 1, 2017

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  Are you looking for a part time job that is flexible? Are you looking to help youths understand the basics of mathematics, sciences, and other skills? Are you looking for a great resume builder? Finally, are you looking to get paid to do all of this? Then contact Robin Stone or John Fedor of TRIO Student Support Services for a chance to apply to a tutoring position!

Or come down and visit for face to face talk! We are located in the basement of the Carlson Library connected to the LEC.

John Fedor:

Phone: 419-530-3617

Email: John.Fedor@utoledo.edu

Robin Stone:

Phone: 419-530-3848

Email: Robin.Stone@utoledo.edu

Also talk with our BIOE seniors Nick Bozovich or Michael Peachock.

Protected: Basic Transport Phenomena BME – Chapters 3-6 February 28, 2017

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Answers to 1st Exam February 24, 2017

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answersHere are the answers for the 1st exam. Problem 1: Re=50370, 22079 mmHg , Problem 2: 78307 g/mole , Problem 3: Re=243, 70.41 mmHg , Problem 4: false, Casson, 64Pa, .766 Pa sec

Homework Assignment #10 – UPDATE February 24, 2017

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Here is homework assignment #10 NOW due on March 3rd,  in chapter 5 work problems 2, 24, 40, 44, 47

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Homework Assignment #9 February 15, 2017

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Here is the link to HW#9 due on Monday, February 27th, hw9

Extra Bernoulli Examples February 14, 2017

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 Here are the problem statements and the answers for the two problems we worked in class.

  1. Two tanks are connected by 300m of 7.5 cm diameter steel pipe. One of the tanks is open to the atmosphere (tank 2) and the other tank (tank 1) is maintained at an internal pressure of P1. The diameter of each tank is quite large so that the velocities of the liquid surface in each tank is negligible. The fluid in the tanks is an oil with a viscosity of 100 cP and a density of 0.80 g cm-3. What should the pressure be in the closed tank, i.e., P1, relative to atmospheric pressure, i.e., P2, so that the flowrate of the oil from tank 1 to tank 2 is 7 kg sec-1. Express the pressure in units of mmHg. The surface of the liquid contained in tank 1 lies 9 meters below the surface of the liquid in tank 2. Answer 3063 mmHg
  2. Consider the design of a power injector that rapidly injects a bolus of imaging contrast agent into a blood vessel. The diameter of the injector barrel is 2.5 cm and this is connected to a catheter with an inside diameter of 0.98 mm and a total length of 50 cm. Calculate the pressure (PSI) inside the power injector barrel and the force (N and lbf) required to deliver a flow rate of the contrast agent of 8 cm3 per second through the catheter. The contrast agent has a viscosity of 2.5 cP and a density of 1 g cm-3. The gauge pressure in the blood vessel is equal to 8 mmHg (gauge pressure). Assume the power injector is horizontal and at the same level as the injection site on the patient’s arm. Also, you can neglect any frictional force developed between the power injector’s plunger and the barrel wall that encloses the contrast agent within the power injector. In addition, the pressure losses due to fluid motion within the barrel itself are negligible in comparison to the pressure loss within the catheter and the pressure loss due to the contraction of the fluid as it enters the catheter. This means the pressure of the contrast agent fluid within the power injector barrel is constant. Recall that gauge pressure is that pressure relative to the local atmospheric pressure. Absolute pressure is gauge pressure plus local atmospheric pressure. Answer 135 lbf