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By E E Khalil

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ROOMVENT 2002. Air Distribution Systems 21 8. Sekhar, S. , Wai, T. , and Hien, W. N. 2001. Indoor air quality, ventilation and energy studies in hot and humid climates. Clima 2000, Napoli. Medhat, A. A. 1999. Air flow patterns in air conditioned rooms. D. Thesis, Cairo University. Khalil, E. E. 1999. Fluid flow regimes interactions in air conditioned spaces. Proceedings of the 3rd Jordanian Mechanical Engineering Conference, Amman, May 1999, p. 79. 11. , and Khalil, E. E. 2003. Simulation of flow, heat transfer and relative humidity characteristics in air-conditioned surgical operating theatres.

77) and similarly for all velocities components. The starred values are guessed values and Du is the pressure difference coefficient. 71, with Su now representing the local continuity imbalance in the prevailing velocity field. 6 Solution Algorithm The finite difference equations are solved by iteration, employing inner and outer sequences. The outer iteration sequence involves the cyclic application Mathematical Modeling Technique 45 of the following steps: First, a field of intermediate velocities, denoted by starred values, is obtained by solving the associated momentum equations using the prevailing pressures p*.

In symbolic form, this statement is D Dt ∫ sys  e ρ dV =   ∑Q − ∑Q D Dt . in ∫ sys out    +  sys ∑W − ∑W . 27a) sys .  . 27b)   sys The total stored energy per unit mass for each particle of mass in the ­system, e, is the summation of the internal energy per unit mass and the kinetic energy per unit mass and the potential energy per unit mass. 2 Differential Form The differential form is obtained by balancing all sources of energy, conduction, convection, shear work, and the internal heat generation/dissipation­.

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