# ideal gas law

The Flow of Real Gases Through Porous Media » Abstract. The effect of variations of pressure-dependent viscosity and gas lawdeviation factor on the flow of real gasses through porous media has beenconsidered. A rigorous gas flow equation was developed which is a second order, non-linear partial differential equation with variation coefficients. Thisequation was reduced by a change of variable to a form similar to thediffusivity equation, but with potential-dependent diffusivity. The change ofvariable can be used as a new pseudo-pressure for gas flow which replacespressure or pressure-squared as currently applied to gas flow.Substitution of the real gas pseudo-pressure has a number of importantconsequences. First, second degree pressure gradient terms which have commonlybeen neglected under the assumption that the pressure gradient is smalleverywhere in the flow system, are rigorously handled. Omission of seconddegree terms leads to serious errors in estimated pressure distributions fortight formations. Second, flow equations in terms of the real gaspseud Dx.doi.org

thermodynamics - Differentiating the ideal gas law - Physics Stack… » Dec 19, 2011… It's derivative is equal to 1 for every point on the real line. Therefore, dxp is equal to an identity transformation for every point p on the … Physics.stackexchange.com

Lattice Boltzmann Units Example » I was wondering if it would be possible to make a sticky post for a units example. It seems that units can be frustrating to figure out for people new to LBM. I did an example below. I had one question about the pressure conversion and multiplying by rho. Units example of LBM Have a 2-D channel flow that is 4 cm long and 1 cm wide ___________________________________________ | | |… Palabos-forum.unige.ch