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A rotating viscometer consists of two concentric cylinders-a stationary inner cylinder of radius
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Fluid Mechanics: Fundamentals and Applications
- 1. For the shown conic body which rotating with constant angular velocity 10 rad/s, find the torque which effected by viscosity of the oil that surrounding the conic body. Take: Radius of the cone is 2 in Height of the cone is 4 in Oil viscosity is 3.125x107 lb.s/in? Answer : Torque =0.02535 lb. In P10 rad/s 0.01-in film 0.01 inarrow_forwardA rotating viscometer consists of two concentric cylinders—a stationary inner cyliner of radius Ri and an outer cylinder of inside radius Ro rotating at angular velocity (rotation rate) ?o. In the tiny gap between the two cylinders is the fluid whose viscosity (? ) is to be measured. The length of the cylinders in Fig is L. L is large such that end effects are negligible (we can treat this as a two-dimensional problem). Torque (T) is required to rotate the inner cylinder at constant speed. Showing all your work and algebra, generate an approximate expression of T as a function of the other variables.arrow_forwardA piston with a diameter of 0.8 m and width of L=0.6 m rotates with 6 rad/s inside a cylinder that has a diameter of 1 m that filled with oil that has a viscosity of -3 8x10 N.s/m What is the shear force that acts on the circumference of the piston (N)? Assume the variation in velocity of the oil is linear. piston L Oil 0.8 m 1 marrow_forward
- A plate situated at distance of 7 mm from a fixed plate is moving at velocity of 3 m/s. The gap between the plates is filled with oil with density of 800 kg/m3 and kinematic viscosity of 1,25·10-4 m2/s. What is the shear stress on the surfaces? Round off the answer to an integer in Pa, but enter the answer without the unit.arrow_forwardA 5.2 N force moves a piston inside a cylinder at a velocity of 3 m/s under specific density 0.89 is shown in Figure 1. The piston of 12.2 cm diameter is centrally located in the cylinder having an internal diameter of 12.27 cm. An oil film separates the piston from the cylinder. Find the kinematic viscosity of the oil.arrow_forwardA piston with a diameter of 0.8 m and width of L-0.2 m rotatęs with 6 rad/s inside a cylinder that has a diameter of 1m that filled with oil that has a viscosity of 8x10 N.s/m 2.00 What is the shear force that acts on the circumference of the piston (N)? ion Assume the variation in velocity of the oil is linear. piston Oil 0.8 m 1 marrow_forward
- A steel ball with the density of 6324 kg/m and the radius of 0,48 cm was dropped into the oil whose viscosity was to be measured as is seen in the figure. When the ball attains a constant velocity, the distance that the ball travelled was measured as 97 cm within the time interval of 4 sec. Before the experiment, the mass of the 100 ml-oil was measured as 2,8 gr. According to the data given above, find; a) the density of the oil (in kg/m). (Please do not use any decimal digit.) Yanıt:arrow_forwardA square block weighing 1.1 KN and 250 mm on an edge slides down an 20 degrees inclined on a film of oil 6.0 micrometer thick. Assuming a linear velocity profile in the oil, what is the terminal speed of the block in m/s. The viscosity of the oil is 7 mPa-s.arrow_forwardTwo plates are separated by 30 mm space. The lower plate moves at velocity of 2 m/s while the upper plate moves at a velocity of 8 m/s. Oil (S-0.84) which fills the space. The oil viscosity is equal to 0.003 m /s. The variation in velocity of the oil is linear. What is the shear stress in the oil (N/m2)? upper plate 8 m/s 30 mm OIL 2 m/s lower plate Lenovo K9 Note AI Dual Cameraarrow_forward
- The space between two square flat parallel plates is filled with oil. Each side of the square plate is 0.8 m. The specific weight of the oil is 9620 N/m?, the thickness of the oil film is 16.6 mm and requires a force of 170 N. Take the kinematic viscosity of the liquid as 16 stokes. Determine (i) the shear stress (i) the density of oil (ii) the dynamic viscosity in poise and (iv) the moving velocity of the upper plate. (ENTER ONLY THE VALUE IN THE BOXES BY REFERRING THE UNIT GIVEN IN BRACKET. ALSO UPLOAD YOUR HAND WRITTEN ANSWERS IN THE LINK PROVIDED) ()Shear stress in N/m2 (ii)The density of oil in kg/m (ii)The dynamic viscosity in poise (iv)The moving velocity of the upper plate in m/s.arrow_forwardThe inclined tube manometer shown in the next figure is used to measure small pressure perturbations (Ap). This manometer is composed of a large tube (diameter (D), area (A)) and a small inclined capillary tube (diameter (d), area (a)) and angle (0). Any small pressure difference will result in fluid displacement (Ah) in the large tube and a significant displacement of the fluid in the capillary at a length (AL.). Ap AL initial level Ap (1) Obtain a relationship between (Ah) and (AL) ! (hint: displaced liquid in large tube is equal to that in the small tube ) (2) What the formula for (z2 – 21) ? (hint : height between level 2 and level 1) (3) Express the pressure (Pz-P1) in terms of (AL, 0, p, g, d, and D) ? (4) At what angle should the manometer be adjusted so that (AL-5 Ah) ?arrow_forwardIn the study of fluid phenomena, how does Newton's Law of Viscosity affect your calculations?arrow_forward
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