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Frictionless
Jul 05, 2022
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Frictionless
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Frictionless
May 12, 2022
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Frictionless
May 12, 2022
In Thermodynamics Forum
Answer: Reynolds number is the ratio of inertia force to viscous force. It tells us about the type of flow. When the Reynolds number is higher than the critical Reynolds number for a given type of geometry it is regarded as a turbulence flow and when it is below the critical Reynolds number it is regarded as a laminar flow. Depending on the type of flow further calculation of friction factors and other heat transfer-related quantities such as heat transfer coefficient are calculated. Hence whenever analyzing any thermo-fluid flow system it is a must to calculate the Reynolds number.
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Frictionless
May 11, 2022
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Frictionless
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Frictionless
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Frictionless
May 09, 2022
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Frictionless
May 09, 2022
In Thermodynamics Forum
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Frictionless
May 09, 2022
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Frictionless
May 09, 2022
In Thermodynamics Forum
Answer: Let's apply the energy balance equation between the upstream and downstream of the throttling valve. Q + h1= W + h2 + d(KE) + d(PE) Q = 0 Reason: There is not enough time and surface area available for heat transfer W = 0 Reason: There is no lifting of any weight (no thermodynamic work) d(PE) = 0 Reason: There is no potential head difference d(KE) =~ 0 Reason: there may be an increase in velocity at the outlet compared to the inlet but in many cases the change in kinetic energy is insignificant. Hence we remain with h1=~h2 (kJ/Kg)
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