Differentiate between scaler, vector and tensor in context to transport phenomena.
[3 marks]Give the analogy between heat, momentum and mass transport.
[4 marks]Develop an expression for Navier-Stokes Equation in Cartesian Co- ordinate system.
[7 marks]Compare and contrast the procedures for solving one dimensional and two dimensional momentum transport.
[3 marks]Compare and contrast the molecular and convective mechanisms for heat transport.
[4 marks]Develop the shear stress and velocity distribution profile for the laminar flow in the inclined plane. State assumptions made while deriving these expressions.
[7 marks]Develop the shear stress and velocity distribution profile for the downward laminar flow through pipe. State assumptions made while deriving these expressions.
[7 marks]Define the following: (1) Biot no. (2) Brinkman number
[3 marks]Compare the mechanism of free and force convection.
[4 marks]Develop the heat flux and temperature distribution profile for heat conduction in with a viscous heat source. State assumptions made while deriving these expressions.
[7 marks]Differentiate between steady state and unsteady state heat conduction.
[3 marks]Define the following: (1) efflux time (2) Fully developed flow (3) end effect (4) boundary layer
[4 marks]Develop the heat flux and temperature distribution profile for heat conduction through composite wall. State assumptions made while deriving these expressions.
[7 marks]Write in brief about Fick law of diffusion.
[3 marks]What is the purpose of fins in heat exchange device? Classify various types of fins.
[4 marks]Derive an expression for diffusion of liquid Aevaporating in to non- diffusing gas B1
[7 marks]Distinguish between Molecular mass flux and Convective mass flux.
[3 marks]What is the importance of boundary conditions? State commonly used boundary conditions in mass transport.
[4 marks]Prove that for equimolar counter diffusion D = D . AB BA
[7 marks]Differentiate between diffusion-controlled reaction and chemical kinetics controlled reaction with suitable example.
[3 marks]What is importance of momentum, thermal and mass diffusivities?
[4 marks]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/s. The local mass flux of chlorine in water at interface is estimated by expression. What is the absorption rate in gmoles/hr, if the liquid-phase diffusivity of the chlorine-water system is 1.26 *10-5 cm2/s, and if the saturation concentration of chlorine in water is 0.823 g chlorine per 100 g water (at 16 ºC). (Assumption: No chemical reaction between chlorine and water.)
[7 marks]List out factors affecting diffusion of gas in solid.
[3 marks]Explain the Physical Interpretation of Mass Transfer Coefficient with suitable diagram.
[4 marks]Hydrogen gas is maintained at 3 bar and 1 bar on opposite sides of a plastic membrane, which is 0.3 mm thick. The temperature is 25°C, and the binary diffusion coefficient of hydrogen in the plastic is 8.7*10-8 m2/s. The solubility of hydrogen in the membrane is 1.5*10-3 kmol/m3.bar. What is the mass diffusive flux of hydrogen through the membrane?
