Frictional resistance of the hull (calculation)

The frictional resistance is a force that is generated when the underwater parts of the boat and the water around are in relative movement (the boat moves through the water, or, in other words, the water passes down the boat). Therefore, it is a hydrodynamic force, and as a resistance, it works in the opposite direction to the movement, trying to slow the boat down.

The frictional resistance is due to the energy lost by the boat in overcoming the forces that tie together the molecules of water surrounding the hull and its appendages and in creating the eddies that are left behind. This phenomenon happens in the boundary layer.

Calculation

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See also:

• Introducing the hull.
• What is the Froude number?.
• What the hydrodynamic resistance is and why it matters.
• Calculate the frictional resistance of your boat or yacht.

References:

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