1. A vertical concentric annulus, with outer radius r, and inner radius r, islowered into fluid of surface tension o and contact angle 0 < 90°. Derive anexpression for the capillary rise h in the annular gap, if the gap is verynarrow.2. A solid cylindrical needle of diameter d, length L, and density o n may "float"on a liquid surface. Neglect buoyancy and assume a contact angle of 0°.Calculate the maximum diameter needle able to float on the surface.3. Derive an expression for the capillary height change h, as shown, for a fluidof surface tension Y and contact angle 0 between two parallel plates W apart.Evaluate h for water at 20°C if W = 0.5 mm.

Surface Tension has defined as the surface of a liquid property that enters it to oppose an external…

1. A vertical concentric annulus, with outer radius r, and inner radius r, is lowered into fluid of surface tension o and contact angle 0< 90°. Derive an expression for the capillary rise h in the annular gap, if the gap is very narrow.

1. A vertical concentric annulus, with outer radius r, and inner radius r, is lowered into fluid of surface tension o and contact angle 0< 90°. Derive an expression for the capillary rise h in the annular gap, if the gap is very narrow.

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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