The net skin-friction drag coefficient is a dimensionless parameter used in fluid dynamics and aerodynamics to quantify the skin-friction drag on a solid object or surface moving through a fluid. It represents the portion of drag force caused by the viscous effects of the fluid flowing along the surface of the object. Cf is the […]
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The Reynolds analogy is a concept in fluid dynamics that relates the heat transfer and momentum transfer characteristics of a flowing fluid. It draws an analogy between the convective heat transfer and the viscous shear stress in a fluid flow. CH is the Stanton Number cf is the skin-friction drag coefficient s is the Reynolds
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Enthalpy is a thermodynamic property that represents the total heat content of a system at a constant pressure. It combines the internal energy of a system with the product of its pressure and volume. An adiabatic wall refers to a hypothetical boundary or surface in a thermodynamic system that is assumed to be perfectly insulated
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In aerodynamics, the Reynolds analogy is a concept that relates the skin friction drag and heat transfer characteristics of a fluid flow over a solid body. It is based on the idea that, under certain conditions, the physics of skin friction (momentum transfer) and heat transfer (energy transfer) can be related in a simple way.Â
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Skin friction drag (Cf) is a concept used in fluid dynamics to quantify the drag force experienced by a solid body moving through a fluid, particularly in the context of aerodynamics. It specifically refers to the drag force resulting from the viscous shear stress at the surface of the body due to the fluid’s viscosity.Â
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In flight mechanics, the load factor (n) is a measure of the force experienced by an aircraft or any object relative to its weight. It is expressed as a ratio and represents the ratio of the total aerodynamic force (lift) acting on the aircraft to its weight. Load factor is a fundamental concept used in
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Skin-friction drag is a type of drag force that arises due to the viscous interactions between a fluid and a solid surface. In the context of incompressible turbulent flow over a flat plate, skin-friction drag refers to the force exerted by the fluid on the flat plate’s surface as a result of the shearing action
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The velocity (V) of the fluid is equal to the product of the Mach number (M) and the speed of sound (a) in that fluid. Velocity is a vector quantity that describes the rate of change of an object’s position with respect to time. It specifies both the speed of the object’s motion and its
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The speed of sound in a gas is directly related to the compressibility of the gas. Compressibility is a measure of how easily a gas can be compressed or how its volume changes in response to changes in pressure. The compressibility factor (Z) is often used to characterize the compressibility of gases. a: Speed of
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The isentropic compressibility (τs) of a fluid is a measure of its relative volume change with respect to pressure changes under isentropic (adiabatic and reversible) conditions. It quantifies how much the density of the fluid changes when the pressure is altered without heat exchange (adiabatic process) while keeping the entropy constant. τs: Isentropic compressibility γ:
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