xplain lines to the flow and stream lines when applied to fluid flow deduce the relationship between the them in laminar flow
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Explain lines to the flow and stream lines when applied to fluid flow deduce the relationship between the them in laminar flow
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- Conduct thorough a research on Reynolds Number, laminar and turbulent flow as it relates to mechanics of fluidsDownload Image Download PDF Question: In the context of applied fluid mechanics, explain the difference between laminar and turbulent flow. At what Reynolds number is the transition typically observed in a circular pipe? (Note: The answer to the second part of the question is typically around Re-2300 However, the exact transition point can vary depending on various factors)9At 1 atm and 20 oC, air flows in a 7 cm diameter tube. What should be the maximum air velocity to keep the flow laminar? (kinematic viscosity 1.516E-5 m^2/s)
- Cooling water for a power plant is stored in a pond 900 m in length and 400 m wide. A dry wind at 300 K blows in a horizontal direction parallel to the 900 m side of the pond at a velocity of 2 m/s. The cooling water is at 300 K. Known the air dynamic viscosity v= 1.67 x10m?/s.; the Re transition from laminar flow to turbulent flow is 500,000; and the saturated water vapor pressure at 300 K is 3580 Pa; gas constant R= 8.3144 J/mole.K. 1.) At what position across the pond is the air flow no longer laminar? Would it reasonable to assume that the mean gas-film mass transfer coefficient for water vapor in air is dominated by turbulent flow mass transfer? 2.) As part of an engineering analysis to predict the evaporation rate of water from the pond, determine the mean gas film mass transfer co-efficient. 3.) Calculate the rate of water evaporation from the pond.(a) Write short notes about the following as they are applied in fluid mechanics (i) Uniform flow (ii) Uniform stead flow (b)Consider a cylinder of fluid of length L and radius R flowing steadily in the centre of a pipe of radius r as shown below L r R Show that when the flow in the pipe is laminar the pressure loss is directly proportional to the velocity and obeys the equation Where v is the velocity D is the diameter of the pipeCalculate the pressure drop of starfruit juice drink that flows with a velocity of 1.5 m/sthrough 1.2 m of horizontal sanitary stainless steel tubing with 9 mm inner diameter. Thedensity and viscosity of starfruit juice drink are 2300 kg m -3 and 0.8 x 10 -3 kg m -1 s -1 ,respectively. Calculate the energy losses due to the friction. Use the Moody diagram tosolve this problem.
- Answer the following: What are the characteristics of laminar and turbulent flow? Cite examples of fluids which are laminar and turblulent. What is Reynold’s number? What is its relevance in fluid flow. Define viscosity and ts properties.Water at 303k s flowing at the rate -4 6.3 X10 m²/s of an inside diameter (16) in a pipe having án inside diameter Cib) 52-5mm.' e Reynolds number. Calculate the Given Density of water at 303k water is 0.8cp is 996 kq lm3. Im? Viscosity ofConsider steady state, laminar flow of a fluid in the y direction between two parallel and vertical stationary plates with a distance of h. Derive an equation for the velocity profile.Hint: Choose a volume element and state all your assumptions
- The accepted transition Reynolds number for flow in a circular pipe is Re=2300. For flow through a 5-cm-diameter pipe, at what velocity will this occur at 20°C for a-Air flow and b-Water flow ? Take the Kinematic Viscosity of the air 1.5X10-5 and for water 9.8X10-7Example :- Calculate the power in W/m3 required for mixing an oil of relative density 0.93 and viscosity 18 N.s/m2 in a tank of 15 Cm diameter and 20 Cm height filled to three- fourths of its volume with oil, if the speed of the agitator is 500 rpm. Calculate the speed of agitator if the same mixing is carried out at the same Reynolds number in a doubled volume tank.Provide an example list of Laminar and Turbulent Flow.