By H. Versteeg, W. Malalasekra

This article goals to supply info for amateur CFD clients who, while constructing CFD abilities through the use of software program, want a reader that covers the basics of the fluid dynamics in the back of complicated engineering flows and of the numerical answer algorithms on which CFD codes are dependent.

**Read Online or Download An Introduction to Computational Fluid Dynamics: The Finite Volume Method Approach PDF**

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**Extra resources for An Introduction to Computational Fluid Dynamics: The Finite Volume Method Approach**

**Example text**

Determine the specific volume, in m3/kg, 30 Chapter 2. Getting Started in Thermodynamics: Introductory Concepts and Definitions of the methane in the cylinder initially. Repeat for the methane in the cylinder after the 5 kg has been added. 3 ϭ constant. 25 bar. Determine the final volume, in m3, and plot the process on a graph of pressure versus specific volume. 23 A closed system consisting of 1 lb of a gas undergoes a process during which the relation between the pressure and volume is pV n ϭ constant.

The quantity mgz is the gravitational potential energy, PE. 2) Potential energy is associated with the force of gravity (Sec. 3) and is therefore an attribute of a system consisting of the body and the earth together. However, evaluating the force of gravity as mg enables the gravitational potential energy to be determined for a specified value of g knowing only the mass of the body and its elevation. With this view, potential energy is regarded as an extensive property of the body. To assign a value to the kinetic energy or the potential energy of a system, it is necessary to assume a datum and specify a value for the quantity at the datum.

8) Since dV is positive when volume increases, the work at the moving boundary is positive when the gas expands. For a compression, dV is negative, and so is work found from Eq. 8. These signs are in agreement with the previously stated sign convention for work. For a change in volume from V1 to V2, the work is obtained by integrating Eq. 9) V1 Although Eq. 9 is derived for the case of a gas (or liquid) in a piston-cylinder assembly, it is applicable to systems of any shape provided the pressure is uniform with position over the moving boundary.