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Dynamic Viscosity

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Dean Number

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The Dean number is a dimensionless group in fluid mechanics, which occurs in the study of flow in curved pipes and channels.

Archimedes Number

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The Archimedes number is used to determine the motion of fluids due to density differences. It is a dimensionless number defined as the ratio of external forces to internal viscous forces.

Acceleration Number

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The acceleration number characterizes acceleration flow.

Bagnold Number

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The Bagnold number is the ratio of grain collision stresses to viscous fluid stresses in a granular flow with interstitial Newtonian fluid.

Bejan Number for Heat Transfer

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The Bejan number is the dimensionless pressure drop along a channel of length L.

Blasius Boundary Layer Thickness

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A Blasius boundary layer describes the steady two-dimensional laminar boundary layer that forms on a semi-infinite plate, which is held parallel to a constant unidirectional flow.

Blasius Displacement Thickness

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A Blasius boundary layer describes the steady two-dimensional laminar boundary layer that forms on a semi-infinite plate, which is held parallel to a constant unidirectional flow.

Brinkman Number

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The Brinkman number is a dimensionless number related to heat conduction from a wall to a flowing viscous fluid, commonly used in polymer processing.

Brinkman Rheological Number

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The Brinkman number is a dimensionless number related to heat conduction from a wall to a flowing viscous fluid, commonly used in polymer processing.

Brownell–Katz Number by Viscosity

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The Brownell–Katz number is a combination of capillary number and Bond number.

Capillary Number

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The capillary number represents the relative effect of viscous forces versus surface tension acting across an interface between a liquid and a gas, or between two immiscible liquids.

Catheter Flow Rate

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The catheter flow rate refers to the liquid volume flow from a catheter.

Darcy's Law Using Pressure Difference

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Darcy's law is an equation that describes the flow of a fluid through a porous medium.

Drag Force on a Sphere for Stokes Flow

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Stokes flow is a type of fluid flow where advective inertial forces are small compared with viscous forces.

Hydraulic Conductivity

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Hydraulic conductivity is a property of vascular plants, soils and rocks that describes the ease with which a fluid (usually water) can move through pore spaces or fractures. It depends on the intrinsic permeability o...

Mean Free Path Using Pressure

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The mean free path is the average distance traveled by a moving particle (such as an atom, a molecule or a photon) between successive impacts (collisions), which modifies its direction, energy or other particle proper...

Mean Free Path Using Electron Density

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The mean free path is the average distance traveled by a moving particle (such as an atom, a molecule or a photon) between successive impacts (collisions), which modifies its direction, energy or other particle proper...

Poiseuille's Law

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Poiseuille's law is a physical law that gives the pressure drop in an incompressible and Newtonian fluid in laminar flow flowing through a long cylindrical pipe of constant cross-section.

Prandtl Number Using Thermal Conductivity

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The Prandtl number is a dimensionless number defined as the ratio of momentum diffusivity to thermal diffusivity.

Rayleigh Number Using Thermal Conductivity

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The Rayleigh number for a fluid is a dimensionless number associated with buoyancy-driven flow, also known as free convection or natural convection.

Reynolds Number Using Dynamic Viscosity

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The Reynolds number is an important dimensionless quantity in fluid mechanics used to help predict flow patterns in different fluid flow situations.

Schmidt Number Using Dynamic Viscosity

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The Schmidt number is a dimensionless number defined as the ratio of momentum diffusivity (kinematic viscosity) and mass diffusivity, and is used to characterize fluid flows in which there are simultaneous momentum an...

Suratman Number

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The Suratman number is a dimensionless number used in the characterization of free-surface fluid dynamics. It represents a ratio of surface tension to the momentum transport (especially dissipation) inside a fluid.

Sutherland's Formula

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Sutherland's formula can be used to derive the dynamic viscosity of an ideal gas as a function of the temperature.

Viscosity Conversion Formula

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The kinematic viscosity is the ratio of the dynamic viscosity μ to the density of the fluid.