FLUID MECHANICS: —INTERVIEW SHORT QUESTION ANSWERS ON circulation, vorticity, Venturimeter, Orifice meter and rotameter, coefficient of discharge, Continuity equation, capillary action, lower and upper critical Reynolds numbers, measurement of discharge in Venturimeter and Orifice meter, friction coefficient in laminar and turbulent flow Define circulation. How is it different from vorticity? Circulation It is defined as […]
FLUID MECHANICS MECHANICAL ENGINEERING M C Q INTERVIEW SHORT QUESTION ANSWERS ON FLUID MECHANICS–SHEET 4:Definition of a turbulent flow, turbulence and types of turbulence, advantages of Venturimeter over orifice meter, Definition of Vena Contracta, differences between triangular and rectangular notches, Differences between lower and upper Reynolds critical numbers, limitations and characteristics of a flow net Define a turbulent flow. A […]
INTERVIEW SHORT QUESTION ANSWERS ON FLUID MECHANICS– SHEET 3 :Assumptions in the Bernoulli’s theorem, Pascal’s Law, Froude’s number and its significance, difference between Darcy and Fanning equations for the pressure drop State the assumptions used in the Bernoulli’s theorem. Assumptions used in the derivation of Bernoulli’s theorem are Fluid is ideal i.e. there are no losses […]
INTERVIEW SHORT QUESTION ANSWERS ON FLUID MECHANICS -SHEET 2 :Weber number and its significance, definition of a Weir, differences between a notch and a weir, head loss due to friction in a turbulent liquid, major and minor losses in a pipe flow, two most commonly used pipe joints What is a Weber number? State its significance. […]
FLUID MECHANICS MECHANICAL ENGINEERING M C Q INTERVIEW SHORT QUESTION ANSWERS ON FLUID MECHANICS–SHEET 1: Newtonian and Non-Newtonian fluids, Type of flow with respect to Mach number, flow net and its utility, friction loss in Bernoulli’s equation, Buckingham’s Pi Theorem Differentiate between Newtonian and Non-Newtonian fluids. Newtonian fluid: It is a fluid with a constant viscosity at a particular […]
FLUID MECHANICS MECHANICAL ENGINEERING Major and Minor Friction Pressure Losses in a Pipe Flow—-Continued on Next Page Pressure loss in fluid flow through pipes depends on (i) Pipe material and its roughness (ii) Shape and size of the pipe (iii) Shape and size of the pipe fitting (iv) Type of flow (laminar, turbulent and transition […]
Vorticity and Rotation Before vorticity is discussed, it is important to establish in a case under consideration whether the flow exist or not. For flow to exist, equation of continuity must be satisfied. For an in-compressible fluid ∂u/∂x = 0 for 1- dimensional flow ∂u/∂x + ∂v/∂y = 0 for a 2- dimensional flow ∂u/∂x […]
FLUID KINEMATICS—-EQUATIONS OF FLUID MOTION–Continuity equation Equations of fluid motion use two approaches. (i) Integral approach–Not being dealt here. (ii) Differential approach Differential approach uses Control Volume method A control volume is a finite region having OPEN boundaries through which there is mass transfer, momentum transfer and energy transfer. Control volume method considers the followings […]
Stream Function, Velocity Potential and Cauchy Reimann Equations—-2 and STREAM FUNCTION VS VELOCITY POTENTIAL VELOCITY POTENTIAL Velocity Potential φ is a Scalar Function of space and time co-ordinates such that its NEGATIVE derivative with respect to any direction give the fluid velocity in that direction. Thus φ is a 3-D function. φ= f(x, y, z, t) For […]
Fluid Mechanics Mechanical Engineering–Stream Function, Velocity Potential and Cauchy Reimann Equations—-1 STREAM FUNCTION AND VELOCITY POTENTIAL Stream function ‘ψ’ and velocity potential ‘φ’ are arbitrary fictitious parameters. These do not exist in actual practice. Fluid flow is a complex phenomenon. Thus these have been developed to understand some complexity of fluid dynamics in a easy […]