What is the name of the process where a liquid or gas flows around a solid object, creating a force called drag?

What is the name of the process where a liquid or gas flows around a solid object, creating a force called drag?
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1 Answer

Answer :

A: Fluid dynamics.
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A spherical particle is falling slow in a viscous liquid such that Reynolds number is less than 1. Which statement is correct for this situation? (A) Inertial and drag forces are important (B) Drag, gravitational and buoyancy forces are important (C) Drag force and gravitational forces are important (D) None of the above

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The region between the separation streamline and the boundary surface of the solid body is known as (A) Wake (B) Drag (C) Lift (D) Boundary layer

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Rotation is simply---------object w.r.t origin or centre point. a.Turn b.Shift c.Compression d.Drag element

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Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as (A) Lift (B) Drag (C) Stagnation pressure (D) Bulk modulus

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Which one of the following statements about PYROLYSIS, which is a process for solid waste treatment is incorrect? (1) It converts the waste into solid, liquid and gas of which the resultant liquid and gas can be used to produce energy. (2) The process occurs at a temperature above 430°C at atmospheric pressure. (3) The process occurs under high pressure at temperature above 430° C. (4) It is a thermochemical decomposition of organic waste

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If weight of a falling tennis ball is 1.0 N and drag force acting on it is 0.2 N then resultant force is A. 0.8 N B. 0.5 N C. 1 N D. 2 N

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Drag force acting on a body does not depend upon the (A) Density of the fluid (B) Density of the body (C) Velocity of the body (D) Projected area of the body

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As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 (A) Increases linearly with V (B) Decreases linearly with V (C) Decreases as V2 (D) None of these

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Drag force on the float of a Rotameter is (where Q = flow rate of the) (A) ∝ Q (B) ∝ √Q (C) ∝ Q2 (D) Constant

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Which of the following relationship is valid for the equilibrium position of the float in a Rotameter? (Where, Df= Drag force on the float Bf = Buoyant force on the float Wf = Weight of the float). (A) Df + Bf = Wf (B) Df = Bf + Wf (C) Df + Bf + Wf =0 (D) None of these

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It is the unbalanced force developed in a turbo jet engine that is caused by the difference in the momentum of the low-velocity air entering the engine and the high velocity exhaust gases leaving the engine.  a. Fall  b. Lift  c. Drag  d. Thrust

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