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Q. What do you mean by Rigid bed models?
Models with rigid boundary and geometrically similar form are used in studies connected with outlet works, stilling basins, spillways etc. Conditions of Froude Number equality, equality of horizontal and vertical scales and adoption of some flow formula enable working out of the scales of the model. The scale of boundary friction in this case works out to be such that model is required to be made smoother than the prototype.
Rigid boundary models are often constructed for determination of flood levels in rivers and flood routing studies. If geometrically similar model is constructed, depth, velocity and Reynolds Number in the model becomes too small whereas discharge required becomes too big. These difficulties can be surmounted if depths are exaggerated in the model. Such models are, therefore, termed vertically exaggerated models. Since long lengths of rivers are normally required to be reproduced in such models, availability of space usually puts constraint on horizontal scaling. Vertical exaggeration results in model roughness being required more than in the prototype which is often achieved by embedding artificial roughness elements. This puts another constraint on scaling. Exaggeration of depths in relation to horizontal dimensions is generally high in such models.
Type of Lubrication Systems The complete lubrication of a vehicle can be divided into two systems. (a) Engine lubrication system. (b) Chassis lubrication system.
Q. Corrosion resistance of the nickel-based alloys? The corrosion resistance of the nickel-based alloys can also be significantly affected by other variables such as velocity a
Q. What are Interconnecting pipe racks? Interconnecting pipe racks carry the main process inlet, export and transfer lines and utility distribution lines to and from process an
Define Principal Process for Electron Beam Machining A beam of electrons is emitted from the electron gun which is basically following three points. 1. A cathode whic
(a) Derive an expression for the otto cycle to determine the Mean Effective Pressure and efficiency. (b)The two engines are to perform on diesel and otto cycle with the followin
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Equilibrium in concurrent force system: Sol.: The steps for solving problems of equilibrium in concurrent force system are as follows: 1. First draw free body diagram
The hardened layer depth is the measure of harden-ability. A good harden-ability will sense even thicker sections are uniformly hardened. Conversely a poor harden-ability will gene
Equalit y of Temperature: Two systems are having equal temperature if there are no changes in their properties when they are kept in thermal contact with each other. Zer
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