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Shear stress of water is the force per unit area that is exerted on a fluid when it flows parallel to a surface. In other words, it is the measure of the resistance of water to flow due to the friction between water molecules and the surface it is in contact with.
The formula for calculating shear stress of water is: τ = μ * (du/dy), where τ is the shear stress, μ is the dynamic viscosity of water, and (du/dy) is the velocity gradient of water.
The shear stress of water is affected by several factors including the viscosity of water, the velocity of water, the surface area in contact with the water, and the type of surface the water is flowing over.
Shear stress of water is an important concept in fluid dynamics and is used to understand and predict the behavior of fluids in various applications. It is particularly important in industries such as engineering, environmental science, and geology where the flow of water is a critical factor.
Shear stress of water can be reduced by decreasing the velocity of water, increasing the viscosity of water, or by using different types of surface materials that have lower friction with water. In some cases, adding certain chemicals to water can also reduce its shear stress.
