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The Reynolds number is the relationship between inertial forces (numerator) and viscious forces (demoninator).
The terms in the numerator are usually the fluid density, velocity, and "characteristic" dimension (which has units of length).
Depending on the type of problem you are trying to solve that characteristic dimension may be a length (flat plate problem) or a diameter (flow in a round tube), or hydraulic diameter (non-circular internal flow).
Since a non-circular cross section has more surface area than a circular cross section area there needs to be a way to account for this difference.
If you use the hydraulic diameter equation to calculate the hy. dia. of a circular cross section, you will get the diameter of the circle.
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How do you calculate outside diameter of a steel coil?
To calculate the outside diameter of a steel coil, you first need to determine the inside diameter (ID) and the thickness of the steel material. The outside diameter (OD) can then be calculated using the formula: OD = ID + 2 × thickness. If the coil is wound in layers, you may also need to account for the number of layers by adding the thickness multiplied by the number of layers to the ID.
What is the circumfrence of a circle with a diameter of 6?
Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.
How do you calculate 45 degree elbow center?
1.Center to face=25,4* the given inche 2.diameter= number of inches /the given inche 3.radius =c to f-diameter 4. Circumference
What is dimensional formula of Reynolds number?
it is a pure number and has no dimension
What number must a diameter add up 2?
There is no such number. A diameter can be any number that you like.
