Basic Fluid Properties
Table of Contents
Fluids, which include both liquids and gases, are fundamental in fluid mechanics, where their behavior is analyzed based on key properties that influence motion, pressure, and flow dynamics. These properties determine how fluids respond to external forces and interact with their surroundings in various engineering applications.
Density
ratio of mass of fluid and its volume.
Units:
Specific Volume
is the reciprocal of the specific volume.
Specific Weight
weight of the fluid per unit volume.
Where g, is the acceleration due to gravity 9.81 m/s^2
Units:
Specific Gravity
ratio of density of a substance to density of water.
Bulk Modulus of Elasticity
Materials resistance to compression
Compressibility
reciprocal of the bulk modulus. It measures how much a material decreases in volume when subjected to pressure.
Units:
Viscosity
Units: poise or 0.1 Pa-s
Surface Tension
The force responsible for the tension that acts along its surface and arises from the attractive forces between the liquid’s molecules. The strength of this force per unit length is known as surface tension.
Capillary Action
is when liquid rise or fall through narrow spaces without external forces.
References
J. D. Anderson Modern Compressible Flow with Historical Perspective, 3rd ed. New York: McGraw-Hill, 2003.
F L U I D M E C H A N I C S FUNDAMENTALS AND APPLICATIONS Third Edition. (n.d.). https://engineeringbookslibrary.wordpress.com/wp-content/uploads/2019/03/fluid-mechanics-fundamentals-and-applications-3rd-edition-cengel-and-cimbala-2014.pdf