GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
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Subject Code: 2180507 Date: 09/05/2019
Subject Name: Transport Phenomena
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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Q.1
(a) Discuss Classification of transport processes. [03]
(b) Discuss the importance of studying transport phenomena. [04]
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(c) State and explain Newton’s Law of viscosity and discuss how it is analogous with Fourier’s Law of heat conduction and Fick’s Law of binary diffusion. [07]
Q.2
(a) Discuss about the conservation laws [03]
(b) Discuss about shell momentum balance and boundary conditions in general. [04]
(c) Derive velocity distribution for a flow of a falling film. [07]
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OR
(c) Discuss Navier-Stokes equation in Cylindrical co-ordinate. [07]
Q.3
(a) Give brief introduction about equimolar counter diffusion. [03]
(b) Derive the equation of continuity. [04]
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(c) Derive flux equation of diffusion of A through non-diffusing B. [07]
OR
Q.3
(a) Explain Fick’s law of binary diffusion. [07]
(b) Find the temperature distribution for heat conduction due to the viscous heat dissipation for flow of an incompressible Newtonian fluid between two concentric cylinders. [07]
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Q.4
(a) Discuss Fourier’s Law of heat conduction in brief. [03]
(b) A copper wire has a radius of 2 mm and a length of 5 m. For what voltage drop what the temperature rise at the wire axis be 10 °C, if the surface temperature of wire is 20 °C? [04]
(c) Discuss heat conduction with chemical heat source. [07]
OR
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Q.4
(a) Discuss about temperature and pressure dependency of thermal conductivity. [03]
(b) Discuss in brief about heat conduction in a cooling fin [04]
(c) Discuss heat conduction with electrical heat source. [07]
Q.5
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(a) Define mass and molar average velocities. [03]
(b) Explain in brief about theory of diffusion of polymer [04]
(c) Discuss about diffusion through a stagnant gas film. [07]
OR
Q.5
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(a) Define mass and molar concentrations. [03]
(b) Discuss the significance of momentum, thermal and mass diffusivities. [04]
(c) Define concentrations, velocities and mass fluxes with reference to mass transport. [07]
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