Articles Posted in the " Fluid Mechanics " Category

  • Del operator-Laplacian operator-Divergence

    Del operator-Laplacian operator-Divergence

    Del operator-Laplacian operator-Divergence Keywords: Del operator ∇ = (∂/∂x,  ∂/∂y, ∂/∂z) Gradient is partial derivative of a function with respect to x or y or z ∂p/∂x is pressure gradient in x direction  ∂p/∂y is pressure gradient in y direction  ∂p/∂z is pressure gradient in z direction ∂v/∂x,  ∂v/∂y, and ∂v/∂z are velocity gradients. ∂V/∂x, […]


  • FLUID MECHANICS — INTRODUCTION

    FLUID MECHANICS — INTRODUCTION

    FLUID MECHANICS INTRODUCTION Fluid flow is a mass transfer process which helps to calculate the size of a pump and  a pipeline for transferring fluids. Fluid flow  effects  rates of heat transfer, mass transfer and  reaction rates . Fundamental laws governing the fluid flow are Conservation of Mass, Conservation of Energy and   Conservation of Linear […]


  • FLUID MECHANICS

    FLUID MECHANICS

    FLUID MECHANICS Keywords:Fluid flow, conservation laws,  Continuity, Bernoulli’s and  Momentum Equation. INTRODUCTION Fluid flow is a mass transfer process which helps to calculate  size of a pump and  a pipeline for transferring fluids and  effects of fluid flow  on rates of heat transfer, mass transfer and on reaction rates . Fundamental laws governing the fluid flow […]


  • M C Q ON CAVITATION

    M C Q ON CAVITATION

                     M C Q ON CAVITATION ·         1. Cavitation is a process of (a) Liquid formation (b) Vapor formation (c) Neither vapor nor liquid formation (d) None ANS: (b) Cavitation is found in (a) An accelerated liquid flow (b) De-accelerated flow (c) Gas flow (d) None ANS: (a) […]


  • M C Q ON WATER HAMMER

    M C Q ON WATER HAMMER

    M C Q ON WATER HAMMER The other name of water hammer is (a) Shock wave (b) Fluid blow (c) Water blow (d) None ANS: ( c) Water hammer is due to (a) Sudden change in internal energy (b) Sudden change in potential energy (c) Sudden change in molecular energy (d) None ANS: (d) Water […]


  • DRAG

    DRAG

    DRAG Keywords:  TERMINAL VELOCITY DRAG Drag is a force of resistance when a body is moving in water or air. In air, it is called aerodynamic drag. It is expressed in Newton’s. It is always against the thrust force. It opposes forward motion.  Drag force  is present in a moving fluid. It is found in fluid […]


  • WATER HAMMER

    WATER HAMMER

    WATER HAMMER Water hammer is also called a fluid hammer or Hydraulic Shock’ or a water blow.  It largely takes place in liquids but to a limited extent it can also be present in gases. It is a very high pressure wave created due to sudden change in momentum due to sudden stopping a moving […]


  • CAVITATION

    CAVITATION

    CAVITATION Keywords: It is process of vapor formation (creating a void in liquid flow) in an accelerated liquid  flow at a certain temperature. The accelerated flow is found in pumps and turbines etc. Due to acceleration, there is an increase in velocity and hence fall of static pressure resulting in low pressure below the saturation […]


  • Bernoulli’s- energy-Momentum equations

    Bernoulli’s- energy-Momentum equations

       Bernoulli’s- energy-Momentum equations Keywords: FLUID MECHANICS: BERNOULLI EQUATION AND MOMENTUM EQUATION Bernoulli Equation The Bernoulli equation comes from Newton’s law of motion. Assumptions used in deriving Bernoulli’s equation: Flow is steady Incompressible flow Non-viscous flow (ideal fluid with zero viscosity) No losses and no energy exchanges Bernoulli’s equation states that “Total head of a […]