Home » Mechanical Engineering » Hydraulics and Fluid Mechanics

Use of bulk modulus in dimensionless numbers The value of bulk modulus of a fluid (or equivalently speed of sound) is required to evaluate which engineering number? Choose the correct option.

Q: Use of bulk modulus in dimensionless numbers The value of bulk modulus of a fluid (or equivalently speed of sound) is required to evaluate which engineering number? Choose the correct option.

Concept/Approach Mach number M = V / c, where c = speed of sound = √(bulk modulus / density). Hence bulk modulus is essential for compressibility/sonic effects captured by Mach number. Final Answer Mach number

Difficulty: Easy

Reynolds number
Froude number
Mach number
Euler number

Correct Answer: Mach number

Explanation:

Concept/Approach

Mach number M = V / c, where c = speed of sound = √(bulk modulus / density). Hence bulk modulus is essential for compressibility/sonic effects captured by Mach number.

Final Answer
Mach number

← Previous Question Next Question→

More Questions from Hydraulics and Fluid Mechanics

Reynolds number for a ship: dependence on velocity and length For a ship moving in water, consider Reynolds number Re = (V × L) / ν, where V is velocity, L is a characteristic length and ν is kinematic viscosity. Complete the statement about how Re varies with the ship's velocity and length.
Fluid mechanics: coefficient of discharge for an external mouthpiece For a sharp-edged external mouthpiece (running free), identify the standard coefficient of discharge value used in calculations. Choose the correct numerical value.
Venturimeter: velocity at the throat versus at the inlet In a venturimeter working under full-bore flow, compare the fluid velocity at the throat with the velocity at the inlet. Choose the correct relation.
Laminar flow in a circular pipe: friction factor dependence on Reynolds number For viscous (laminar) flow in a pipe of uniform diameter, the Darcy friction factor varies as which function of the Reynolds number R_N? Choose the correct expression.
Coefficient of contraction for an orifice Define the coefficient of contraction C_c for a sharp-edged orifice in terms of areas. Choose the correct ratio.
Floating body stability: response to a small angular displacement A floating body is given a small angular displacement and returns to its original position. Identify the equilibrium classification. Choose the correct option.
Power transmitted through a pipeline with head loss Let w be the specific weight (N/m³), Q the discharge (m³/s), H the supply head and h_f the frictional head loss. Select the correct expression for the power delivered at the outlet.
Examples of laminar (low Reynolds number) flow Identify which of the following are classic examples of laminar flow regimes. Choose the correct option.
Dam stability checks: essential limit states When assessing the stability of a gravity wall or dam, which conditions must be verified? Choose the correct option.
Venturimeter installation orientation A venturimeter is used for measuring discharge in a full pipe. Select the correct statement regarding its installation orientation and location.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion