Code No: RR410801

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Set No. 2

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IV B.Tech I Semester Supplementary Examinations,June 2010 TRANSPORT PHENOMENON Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Derive an equation for the temperature distribution in laminar tube flow.

[16]

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2. Two large flat porous horizontal plates are separated by a relatively small distance L. The upper plate at y L is at a temperature Tl and the lower plate at y = 0 is to be maintained at a lower temperature T0. To reduce the amount of heat that must be removed from the lower plate, a coolant gas is blow upward through both the plates at steady state. Develop an expression for the temperature distribution using the equation of energy. [16]

or

3. (a) Explain the concept of thermal conductivity with an example.

(b) What is the analogy between momentum and heat transfer by conduction ? Write the equations for momentum flux and heat flux, and define the notation. (c) Write short notes on the prediction of the viscosities of gases.

[4+6+6]

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4. (a) Explain the qualitative comparison of laminar flow and turbulent velocity distribution (b) Explain Reynolds stresses.

[10+6]

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5. Chlorine is being absorbed from a gas in a small experimental wetted wall tower. The absorbing fluid is water, which is moving with an average velocity of 17.7 cm/sec. What is the absorption rate in g moles / hour if DCl2−H2O = 1.26 ×10−5 cm2 /sec. in the liquid phase and if the saturation concentration of chlorine in water is 0.823 g Cl2 per 100 g of water. Ignore chemical reaction between Cl2 and H2 O. The tower height is 13 cm and radius 1.4 cm. [16]

Aj

6. A fluid flows between two horizontal plates at a distance h apart. The upper plate moves at a velocity vo. The lower plate is stationary. Derive the equation for the velocity profile. [16] 7. A current at 300amps is passed through a stainless steel wire of 2.5mm in diameter. The resisitivity of the wire is 100milli ohm-m and length of wire is 1.5m. It the outer surface temperature of wire is at 2000 C, calculate the center temperature of the wire. The thermal conductivity of the wire is 40W/m0 C. [16] 8. Explain the following: (a) The partial time derivative (b) Total time derivative (c) Substantial time derivative 1

Code No: RR410801

RR

Set No. 2

(d) Navier-stokes equation

[4×4=16]

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or

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in

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2

Code No: RR410801

RR

Set No. 4

in

IV B.Tech I Semester Supplementary Examinations,June 2010 TRANSPORT PHENOMENON Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Explain the concept of thermal conductivity with an example.

ld .

(b) What is the analogy between momentum and heat transfer by conduction ? Write the equations for momentum flux and heat flux, and define the notation.

(c) Write short notes on the prediction of the viscosities of gases.

[4+6+6]

or

2. Chlorine is being absorbed from a gas in a small experimental wetted wall tower. The absorbing fluid is water, which is moving with an average velocity of 17.7 cm/sec. What is the absorption rate in g moles / hour if DCl2−H2O = 1.26 ×10−5 cm2 /sec. in the liquid phase and if the saturation concentration of chlorine in water is 0.823 g Cl2 per 100 g of water. Ignore chemical reaction between Cl2 and H2 O. The tower height is 13 cm and radius 1.4 cm. [16]

uW

3. (a) Explain the qualitative comparison of laminar flow and turbulent velocity distribution (b) Explain Reynolds stresses.

[10+6]

4. A current at 300amps is passed through a stainless steel wire of 2.5mm in diameter. The resisitivity of the wire is 100milli ohm-m and length of wire is 1.5m. If the outer surface temperature of wire is at 2000 C, calculate the center temperature of the wire. The thermal conductivity of the wire is 40W/m0 C. [16] 5. Derive an equation for the temperature distribution in laminar tube flow.

[16]

nt

6. A fluid flows between two horizontal plates at a distance h apart. The upper plate moves at a velocity vo. The lower plate is stationary. Derive the equation for the velocity profile. [16]

Aj

7. Two large flat porous horizontal plates are separated by a relatively small distance L. The upper plate at y L is at a temperature Tl and the lower plate at y = 0 is to be maintained at a lower temperature T0. To reduce the amount of heat that must be removed from the lower plate, a coolant gas is blow upward through both the plates at steady state. Develop an expression for the temperature distribution using the equation of energy. [16]

8. Explain the following: (a) The partial time derivative (b) Total time derivative (c) Substantial time derivative 3

Code No: RR410801

RR

Set No. 4

(d) Navier-stokes equation

[4×4=16]

Aj

nt

uW

or

ld .

in

?????

4

Code No: RR410801

RR

Set No. 1

in

IV B.Tech I Semester Supplementary Examinations,June 2010 TRANSPORT PHENOMENON Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) Explain the concept of thermal conductivity with an example.

ld .

(b) What is the analogy between momentum and heat transfer by conduction ? Write the equations for momentum flux and heat flux, and define the notation. (c) Write short notes on the prediction of the viscosities of gases.

[4+6+6]

or

2. Two large flat porous horizontal plates are separated by a relatively small distance L. The upper plate at y L is at a temperature Tl and the lower plate at y = 0 is to be maintained at a lower temperature T0. To reduce the amount of heat that must be removed from the lower plate, a coolant gas is blow upward through both the plates at steady state. Develop an expression for the temperature distribution using the equation of energy. [16] 3. Derive an equation for the temperature distribution in laminar tube flow.

[16]

uW

4. Chlorine is being absorbed from a gas in a small experimental wetted wall tower. The absorbing fluid is water, which is moving with an average velocity of 17.7 cm/sec. What is the absorption rate in g moles / hour if DCl2−H2O = 1.26 ×10−5 cm2 /sec. in the liquid phase and if the saturation concentration of chlorine in water is 0.823 g Cl2 per 100 g of water. Ignore chemical reaction between Cl2 and H2 O. The tower height is 13 cm and radius 1.4 cm. [16]

nt

5. A current at 300amps is passed through a stainless steel wire of 2.5mm in diameter. The resisitivity of the wire is 100milli ohm-m and length of wire is 1.5m. It the outer surface temperature of wire is at 2000 C, calculate the center temperature of the wire. The thermal conductivity of the wire is 40W/m0 C. [16]

Aj

6. A fluid flows between two horizontal plates at a distance h apart. The upper plate moves at a velocity vo. The lower plate is stationary. Derive the equation for the velocity profile. [16] 7. Explain the following: (a) The partial time derivative

(b) Total time derivative (c) Substantial time derivative (d) Navier-stokes equation

[4×4=16]

8. (a) Explain the qualitative comparison of laminar flow and turbulent velocity distribution 5

Code No: RR410801

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Set No. 1

(b) Explain Reynolds stresses.

[10+6]

Aj

nt

uW

or

ld .

in

?????

6

Code No: RR410801

RR

Set No. 3

in

IV B.Tech I Semester Supplementary Examinations,June 2010 TRANSPORT PHENOMENON Chemical Engineering Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. Explain the following: (a) The partial time derivative

ld .

(b) Total time derivative (c) Substantial time derivative (d) Navier-stokes equation

[4×4=16]

or

2. Two large flat porous horizontal plates are separated by a relatively small distance L. The upper plate at y L is at a temperature Tl and the lower plate at y = 0 is to be maintained at a lower temperature T0. To reduce the amount of heat that must be removed from the lower plate, a coolant gas is blow upward through both the plates at steady state. Develop an expression for the temperature distribution using the equation of energy. [16]

uW

3. Chlorine is being absorbed from a gas in a small experimental wetted wall tower. The absorbing fluid is water, which is moving with an average velocity of 17.7 cm/sec. What is the absorption rate in g moles / hour if DCl2−H2O = 1.26 ×10−5 cm2 /sec. in the liquid phase and if the saturation concentration of chlorine in water is 0.823 g Cl2 per 100 g of water. Ignore chemical reaction between Cl2 and H2 O. The tower height is 13 cm and radius 1.4 cm. [16]

nt

4. A fluid flows between two horizontal plates at a distance h apart. The upper plate moves at a velocity vo. The lower plate is stationary. Derive the equation for the velocity profile. [16]

Aj

5. A current at 300amps is passed through a stainless steel wire of 2.5mm in diameter. The resisitivity of the wire is 100milli ohm-m and length of wire is 1.5m. It the outer surface temperature of wire is at 2000 C, calculate the center temperature of the wire. The thermal conductivity of the wire is 40W/m0 C. [16] 6. Derive an equation for the temperature distribution in laminar tube flow.

[16]

7. (a) Explain the qualitative comparison of laminar flow and turbulent velocity distribution (b) Explain Reynolds stresses.

[10+6]

8. (a) Explain the concept of thermal conductivity with an example. (b) What is the analogy between momentum and heat transfer by conduction ? Write the equations for momentum flux and heat flux, and define the notation. 7

Code No: RR410801

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Set No. 3

(c) Write short notes on the prediction of the viscosities of gases.

[4+6+6]

Aj

nt

uW

or

ld .

in

?????

8