Download SGBAU B-Tech 8th Sem Chemical Engineering Transport Phenomena Question Paper

Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 8th Sem Chemical Engineering Transport Phenomena Previous Question Paper

P. Pages : 2
Time : 'lhree Hours
B.Tech. Eighth Semester (Chemical Engineering) (CGS)
11674 : Transport Phenomena : 8 CH 01
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Max. Marks : 80
Notes :
l. a)
b)
2." a)
b)
3. a)
b)
4. a)
b)
5. a)
b)
6. a)
1 Answer three question from Section A and three question from Section B.
2. Assume suitable data wherever necessary.
3. Illustrate your answer necessary with the help of neat sketches.
4 Use ofslide rule logarithmic tables. Steam tables. Mollier's Chart. Drawing
instrument. Themlodynamic table for moist air, Psychrometric Charts and
Refrigeration charts is permitted.
SECTION ? A
The distance between two parallel plates is 9. l4mm. The lower plate is being pulled at an 7
relative velocity of 366 mm/s. The ?uid held between plates is Soyabean oil of viscosity
0.04 pa's at 303 k. Calculate shear stress and shear rate. If glycerol ofviscosity 1.069 kg/m.s
a1203 K is used instead of Soyabean oil what relative velocity is needed to hold same shear
stress?
Discuss the various types of Non-Nemonian ?uids with examples. 7
OR
Calculate average velocity in terms of max. velocity for velocity pro?le 7
7
u ? u max I r?
X _ X _ 1 '
R -
Derive an Expression for pressure drop for laminar ?ow in circular pipe. 7
Starting with Newton?s second law of motion develop integral momentum balance equation 6
for linear momentum.
A tank having inside diameter 4m & a water level of 2m is to be ?ow through ori?ce of 7
6cm. How long will it take to remove half the contents of the tank & to empty it completely?
OR
A tank containing 100kg of 60% brine is ?lled with 10% salt solution at the rate of 7
10 kg/min. Solution is removed from the tank at the rate of 15 kg/min. Assuming complete
rn'udng. Find the Kg. of salt in the tank a?er 10 min.
Derive Energy equation using over all energy balance. 6
?> 6
For incompressible ?uid at steady stale show that Au = 0 0r
aux (?uy a uz
?? + ?? +?? = 0
6 x 6 y (7 7.
Derive Navier - Stokes equation in rectangular co-ordinates. 7
0R
An oil having density 900 kg/m3& viscosity of 0.105 kg?ms ?ows in the channel formed 10
by the two horizontal stationary plates spaced 0.014111 apart. 1f the avg. velocity is 1.3 m/s.
determine.
i) The velocity pro?le.
_AW - 3492 1 9.10

10.
ll.
12.
AW - 3492
b)
a)
b)
b)
a)
b)
a)
b)
b)
ii) Max. Velocity.
iii) Shear stress at a distance ot?ODUSm from one of the plates.
iv) chd loss in a distance of 15m aiong the length 01? plate.
Explain Dimensional analysis ul'Nawer stokes equation.
SECTION ? B
Derive Laplace equation for heat transfer in solids, state clearly the approach you have
made.
Write the various cases for [10? around submerged objects while dealing with chemical
engineering operations.
0R
Derive von Karman Integral mtmtentum equation & its applications.
Film thickness of boundary. layer is gin an by
3 = 5%le?
qu
Find the expression for drag torce (FDD
Discuss in detail Enhancement factor and mass Trunsfcr regimes.
y 1/;
u / I
Denve Prandtl's one by 56131 power luv? - : ?1???
UK max
0R
Derive an equation for Prandll Taylor analogy for heat & momentum transfer.
A wet (2 dry bulb thermometer is kept in atmosphere if WBT is 18?C. Find DBT by Chilton?
Colburn analogy
Given:
p., =2.1kN/m2 12245;; H? kg
c], =1kJ/kg.k .p air : IQ? Lg m3
pr =0.72 .sc =0.6|
Discuss Prandtl mixing length.
Derive an expression for mass ?ux by litanukwert's surface renewal theory & explain.
Explain the term Hatta number.
0R
Find mass transfer coef?cient by Prandtl - Taylor analogy given that Reynolds No. is
1.6x10?, Kinematic viscosity |5.53x1()"? mz/sec. diffusivity 7x10?6 mzrsec and velocity of
?ow is; 10 m/s.
Show that Sherwood number for a soTid sphere dissoh ing into in ?nitc stagnant medium is
2.
r'.;<;?:'};z';*w*z'?*
(4
10
6