Fluid Mechanics in Naval Architecture, Ocean and Marine Engineering

A set of 20 vocabulary flashcards focusing on key terms and definitions from Fluid Mechanics in Naval Architecture.

Fluid Properties

Characteristics of fluids including density, viscosity, and specific gravity.

Density (ρ)

Mass per unit volume of a substance, measured in kg/m³.

Dynamic Viscosity (μ)

Resistance to shear deformation of a fluid, measured in Pa·s.

Kinematic Viscosity (ν)

Dynamic viscosity divided by density, expressed in m²/s.

Specific Gravity (SG)

Ratio of the density of a substance to the density of water at 4°C.

Pascal’s Law

Pressure applied to an enclosed fluid is transmitted equally in all directions.

Archimedes’ Principle

A body immersed in fluid experiences a buoyant force equal to the weight of the displaced fluid.

Bernoulli Equation

Relates pressure, velocity, and height in a fluid flow, applicable under specific conditions.

Reynolds Number (Re)

Dimensionless number representing the ratio of inertial forces to viscous forces in fluid flow.

Froude Number (Fr)

Dimensionless number comparing the object speed to wave speed, important in ship design.

Hydrostatic Pressure

Pressure exerted by a fluid at rest due to the force of gravity.

Flow Description

Two perspectives: Lagrangian focuses on individual particles, Eulerian focuses on flow at points.

Stagnation Pressure

Pressure at a point in a fluid flow where the flow velocity is zero.

Cavitation Number (σ)

Dimensionless number indicating the risk of cavitation in fluid systems.

Dimensional Analysis

Technique to reduce physical problems to dimensionless parameters, revealing underlying physics.

Model Testing

Experimental method to validate design using scale models while maintaining similarity principles.

Wave Energy

Energy transmitted by waves, affected by wave height and period.

Pitot Tube

Device used to measure fluid velocity by comparing stagnation pressure and static pressure.

Venturi Meter

Flow measurement device that uses the Venturi effect to calculate fluid flow rate.

Fluid Classification

Classification based on flow characteristics: laminar (smooth) or turbulent (chaotic).