Download PTU B-Tech Bio Technology 2020 Dec 3rd Sem 76949 Transport Phenomenon Question Paper

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B.Tech. (BT) (2018 Batch) (Sem.-3)

TRANSPORT PHENOMENON

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Subject Code : BTBT-305-18

M.Code : 76949

Time : 3 Hrs. Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.

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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
4. Use of steam table is allowed.

SECTION-A

Write briefly :

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1. Define Newton’s law of viscosity.
2. Define average velocity. And how do you calculate average velocity?
3. What is power law model?
4. Define Reynold’s number and Prandtl number.
5. What is Chilton Colburn analogy?

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6. Define Navier Stokes equation.
7. What is Biot number for mass transfer? What do we conclude from Biot number is very small (<<1)?
8. Relation between maximum velocity and local velocity, when a fluid flows under laminar, steady state, incompressible Newtonian fluid, in a tube?
9. What are Bingham plastic fluids and pseudo plastic fluids? Explain with example.
10. What is Hagen Poiseullie’s equation?

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SECTION-B

1. An exothermic chemical reaction takes place in a 20 cm thick slab and the energy generation rate per unit volume is 1 x 10⁶ W/ m³ The steady-state heat transfer rate into the slab at the left-hand side, i.e., at x = 0, is 280 W. Calculate the heat transfer rate to the surroundings from the right-hand side of the slab, i.e., at x = L. The surface area of each face is 40cm². Also calculate the heat flux at x =0 and x = L.
2. Water at 20 °C is flowing past a flat plate at 0.914 m s. The plate is 0.305 m wide.
   1. Calculate the Reynolds number 0.305 m from the leading edge to determine if the flow is laminar.
   2. Calculate the boundary layer thickness at x = 0.152 and x = 0.305 m from the leading edge.

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3. Heat is generated in a rectangular heating element of dimensions Im x 0.5m x 0.1m of thermal conductivity 60 W/m K at rate of 15 x 10⁵ W/m³. Calculate maximum temperature in the wall if the surface temperatures are 100°C. Also calculate the heat flux at the surface.
4. The potential function for a two dimensional, irrotational. incompressible flow field is given as @ = x²-2y-y². Find the stream function v and velocity components v_x and v_y
5. Consider a solid cone of circular cross-section whose lateral surface is well insulated as shown in Figure 1. The diameters at x = 0 and x = L are 25cm and 5cm. respectively If the heat flux at x = 0 is 45W/m² under steady conditions; determine the heat transfer rate and the value of the heat flux at x = L.
   

   This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)

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