The velocity of a fluid flow changes its magnitude with respect to space for Steady flow Unsteady flow Uniform flow Non-uniform flow
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- Fluid Mechanics: Open Channel FlowIn a fluid flow, the rate of change of density with respect to time is not equal to zero is Choose the option Uniform flow steady flow Non-uniform flow Unsteady flowIn incompressible fluid flows at .252 m/s through a 44 mm diameter cylindrical pipe the pipe widens to a square cross-sectional area that is 5.5 cm on a side assume steady flow throughout the system what is the speed of the fluid through the square section of pipe.
- A viscous fluid of density 1200 kg/m3 and viscosity 0.9 Pa.s is confined in a spacing of 0,01 m between two parallel and horizontal plates of length 0,6 m and width 0,6 m. The upper plate is pulled with a uniform and steady speed of 0,7 m/s in its own plane. The lower plate is stationary. Viscous fluid flow is laminar steady and incompressible. a) What is the magnitude of mass flow rate in spacing (in kg/s)? b) What is the magnitude of maximum shearing stress in the flow field (in Pa)? c) What is the frictional force over the lower plate surface (in N )? d) What is the frictional power lost in pulling the upper plate (in W)?1.what Reynolds number let Fluid properties in pipe flow are Laminar and Turbulent flow 2. what Reynolds number let Boundary Layer are Laminar and Turbulent flowQ: Consider the unsteady mass conservation equation (1.5) as it might describe the flow accelerating through a duct with a variable cross section. If the largest velocity gradient measured locally is du/dx and the largest density gradient is dpldx, what order-of-magnitude relationship must exist between du/dx and dpldx for the simplified equation (1.8) to be applicable? ap ap +p ax ap ap du av Hint 1: aw + = 0 az +u at ax (1.5) + v. +w. ду az ду du aw Hint 2: ax (1.8) ду
- In a chemistry plant, through a horizontal smooth pipeline with a diameter of 0,3 m, a fluid with density and viscosity of 769 kg/m3 and 0,0007 Pa-s, respectively is flowing with a flow rate of 0,009 m3/s. Disregarding the pipe entrance effects and treating flow being steady, uniform and incompressible; a) Find the magnitude of mean velocity (in m/s). (Please use only 3 decimal digits.) b) Find Reynolds number. (Please do not use any decimal digit.) c) Find the magnitude of friction factor. (Please use 4 decimal digits.)The mean velocity of fluid flow do not change with respect to time at any point is Non-uniform flow Unsteady flow Steady flow Uniform flowThe bernoulli's equation between 2 sections in a flow channel, for ideal fluid is Total Energy available at section1 = Total Energy available at section 2 + Losses OTotal Energy available at section1 Total Energy available at section 2 Total Energy available at section1 = Total Energy available at section 2- Losses Total Energy available at section1 + Total Energy available at section 2 = Losses
- 1. Any equation that comes out of the differential approach is valid at every point in the flow field. On the other hand, the integral approach gives us a point by point value and not an average value. True or False 2. During the analysis of fluid flow, we are more often interested in obtaining the average velocity, and one of the common ways of obtaining the average velocity is to take an average across the flow cross-section. This is called area-average velocity, average along the direction parallel to the principal direction of flow. True or False 3. A crude oil with a density of 875 kilogram per cubic meter is pumped and flowing at 1.5 meter per second through a pipeline 1 meter in diameter. The maximum viscosity of the oil to exhibit a laminar flow behavior is 625 centipoise. True or FalseA two dimensianal flow of a fluid is described by its velocity vector V= -8.667+5 m/sec Its kinetic energy flux is given byAnswer with True or False of the following question: (7M 1. Water flows steadily down a vertical pipe of constant cross section. Neglecting friction, according to Bernoulli's equation, velocity decreases with height. 2. A liquid in an open right circular cylinder is given rigid body rotation about the axis of the cylinder. The pressure distribution in any vertical plane is uniform. 3. A curved surface is submerged in a static liquid. The horizontal component of pressure force on it is equal to the pressure force on a vertical projection of the surface. 4. A U-tube manometer measures the difference in total energy between two points.