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Euler’s Number (Eu) is a dimensionless parameter used in fluid mechanics to characterize the ratio of inertial forces to pressure forces in a fluid flow. It helps understand the relative importance of these forces in determining the behavior of the fluid flow. Euler’s Number is defined as the ratio of pressure to the kinetic energy […]

The Nusselt number (Nu) is a dimensionless number used to characterize the ratio of convective to conductive heat transfer across a fluid boundary layer. It provides insight into the efficiency of convective heat transfer compared to conductive heat transfer. The Nusselt number is defined as the ratio of convective heat transfer to conductive heat transfer

Strain rate (˙ε˙) is a measure of the rate at which deformation occurs in a fluid flow. It quantifies how quickly the fluid is being deformed or sheared as it flows. Strain rate is defined as the rate of change of velocity gradient within a fluid. The SI unit of strain rate is per second

The Bulk Modulus (K) is a measure of the fluid’s resistance to compression under pressure. It quantifies how much a fluid’s volume changes in response to a change in pressure while keeping the temperature constant. The Bulk Modulus is defined as the ratio of the change in pressure to the resulting fractional change in volume.

The Strouhal number (St) is a dimensionless quantity used to characterize unsteady fluid flows, particularly in the context of vortex shedding behind bluff bodies. It relates the frequency of oscillation of a fluid flow to the velocity and characteristic length scale of the flow. The Strouhal number relates the frequency of vortex shedding or oscillation

The Capillary number (Ca), also known as the Ca number, is a dimensionless quantity used in fluid mechanics to characterize the relative importance of viscous forces to surface tension forces in a fluid flow. It indicates whether viscous forces dominate over surface tension forces or vice versa. Where, Ca is the Capillary number, μ is

The Weber number (We) is a dimensionless number used in fluid mechanics to quantify the relative importance of inertial forces to surface tension forces. It is commonly used in the study of fluid flows, especially those involving interfaces or surface phenomena. The Weber number is defined as the ratio of inertial forces to surface tension

The Mach number (Ma) is a dimensionless quantity that characterizes the speed of an object or fluid relative to the speed of sound in the surrounding medium. It indicates whether the flow is subsonic, sonic, or supersonic. Where: Ma is the Mach number. v is the velocity of the object or fluid. c is the

Total pressure (Pt​), also known as stagnation pressure, is the sum of the static pressure and dynamic pressure in a fluid flow. It represents the total energy per unit volume of a fluid stream, accounting for both the pressure energy and kinetic energy. Total pressure is a crucial parameter in fluid mechanics, particularly in analyzing

Dynamic pressure (q) is a measure of the kinetic energy per unit volume of a fluid flowing. It represents the pressure increase experienced by a fluid when it is brought to rest. In aerodynamics and fluid mechanics, dynamic pressure is a critical parameter for understanding the energy associated with fluid motion. Where: q is the