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Alternatives to Petroleum
In 2008, the top 15 oil consuming nations used nearly 60 million barrels of oil…
Posted inBasics
Kinematics of motion of singular surfaces: the speed of displacement
To determine the speed of displacement of a moving singular surface consider a surface as…
Posted inBasics
Shock surfaces
It is a rather common phenomenon that abrupt changes occur at the bounding surface of…
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High velocity gas flow in pipes with friction
The following discussion deals with the case of a relative high velocity gas flow through…
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Variation in area for isentropic flow
In many engineering devices used in the natural gas industry, the flow of a gas…
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Critical flow variables
For compressible flows two regions of different behavior can be recognized depending on the Mach…
Posted inAdvanced Concepts
Dynamical similarity of ideal gas flows
The non-linear nature of Euler’s equation may cause serious mathematical difficulties when solving a problem…
Posted inAdvanced Concepts
Small perturbations at the speed of sound
In a great number of engineering problems one is interested in the perturbation of a…
Posted inAdvanced Concepts
The Vazsonyi-Crocco equation
Now we shall determine the relationships between the kinematic and thermal variables for an ideal…