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In continuum mechanics, the Froude number (Fr, after William Froude, / ˈ f r uː d / [1]) is a dimensionless number defined as the ratio of the flow inertia to the external force field (the latter in many applications simply due to gravity).
The Froude Number is important when analyzing flow in spillways, weirs, channel flows, rivers and in ship design. Water measurement in open channel flow generally requires the Froude number to be less than 0.5 to prevent waves disturbing accurate head readings.
The Froude number represents the ratio of inertial to gravitational acceleration, indicating that a rigid inverted pendulum would escape its circular trajectory at a Froude number or dimensionless speed greater than one.
Froude number (Fr), in hydrology and fluid mechanics, dimensionless quantity used to indicate the influence of gravity on fluid motion. It is generally expressed as Fr = v/ (gd)12, in which d is depth of flow, g is the gravitational acceleration (equal to the specific weight of the water divided by.
Froude number calculator helps you characterize the fluid flow in an open channel by estimating the Froude number for the given flow rate.
Froude number is known as the ratio of characteristic velocity to the gravity wave velocity. Formula related to Froude number and solved examples.
The first Froude number is the dimensionless parameter {\rm Fr}_1\equiv {u\over\sqrt{gL}}, where u is the speed of open channel flow, g is gravity, and L is the length scale. The second Froude number is defined as the ratio of inertial force to gravitational force.
The Froude number is defined as the ratio of the inertia forces to the gravitational forces acting on a fluid flow system. In simpler terms, it is a measure of how fast the fluid is moving relative to the depth of the fluid.
The Froude number is $$\mathrm{Fr}=\frac{v^2}{g \ell},$$ where $v$ is the speed of the flow (or the speed of the moving body), $g$ is the gravitational acceleration and $\ell$ is the typical length of the flow or the body.
The Froude number (Fr) is a dimensionless quantity that compares the inertia forces to the gravitational forces in a fluid. It is defined as the ratio of the velocity of a fluid to the square root of the product of the acceleration due to gravity and a characteristic length scale.