1. Differentiate between Rotational flow and Compressible flow2. A U-tube differential manometer is connected to two pipes A and B as shown in Figure A.Pipe A contains a liquid of specific gravity 1.5 while pipe B contains a liquid of specificgravity 0.9. The pressures at A and B are 98.1 kN/m² and 176.58 kN/m². Determine thedifference in mercury level in the differential manometer.3m2mX--Figure A3. A plane surface of area A is totally immersed in a liquid of specific weight w (Figure B).Its surface is inclined at an angle q to the horizontal and its centroid is at a vertical depthx below the free surface. Show that the resultant force R acts at a distance h given by;in²q_Sinh = lgАхwhere Ig = 2nd moment of area of the immersed surface about an axis through itsparallel to the water surface.centroidxsinetoFigure B

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Civil Engineering

1. Differentiate between Rotational flow and Compressible flow

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Open Channel Flow

Open channel flow is a branch of fluid mechanics. It deals with the flow of fluid in an open conduit or free surface. In an open channel flow, gravity induces the flow of water whose surface is open to the air. This flow is free-falling rather than confined in rigid body conduits. The open channel flow depends upon two parameters that are the cross-section of the conduit and the velocity profile. Practical examples of open channel flow are streams, rivers, canals, and other drainage systems.In open channel flow, the cross-sectional area of at least one of the sides is exposed to air, and the surface of water faces atmospheric pressure. This flow is also known as free gravity flow. The cross-sectional area of the conduit can be either man-made or a natural channel. For instance, the flow in rivers and streams are natural conduits, and the flow in a canal and sanitary systems are man-made or engineered channels.

Question

1. Differentiate between Rotational flow and Compressible flow
2. A U-tube differential manometer is connected to two pipes A and B as shown in Figure A.
Pipe A contains a liquid of specific gravity 1.5 while pipe B contains a liquid of specific
gravity 0.9. The pressures at A and B are 98.1 kN/m² and 176.58 kN/m². Determine the
difference in mercury level in the differential manometer.
3m
2m
X--
Figure A
3. A plane surface of area A is totally immersed in a liquid of specific weight w (Figure B).
Its surface is inclined at an angle q to the horizontal and its centroid is at a vertical depth
x below the free surface. Show that the resultant force R acts at a distance h given by;
in²q_
Sin
h = lg
Ах
where Ig = 2nd moment of area of the immersed surface about an axis through its
parallel to the water surface.
centroid
xsine
to
Figure B

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