By E E Khalil
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And Patankar, S. V. 1974. A calculation procedure for heat, mass and momentum transfer in three dimensional parabolic flows. International Journal of Heat and Mass Transfer 15, 1787. 13. Launder, B. , and Spalding D. B. 1974. The numerical computation of turbulent flows. Computer Methods in Applied Mechanics 3(2), 269–275. 14. , and Khalil, E. E. 2003. Air flow regimes in operating theatres for energy efficient performance. AIAA-2003-0686. 15. Huzayyin, O. A. S. 2005. Flow regimes and thermal patterns in air conditioned operating theatres.
12 Heat removal efficiency Eh. 15 after Kameel and Khalil,11 with numerical procedures outlined in references 12 to 16. 3 Noise Criteria Noise produced by air grilles and supply outlets contributes to discomfort in the room and should be avoided at all times. To identify the spectrum content on noise, the use of noise criteria (NC) is proposed. Generally levels below NC 30 are considered to be quite; noisy conditions refer to NC greater than 50 to 55. 1 indicates the ASHRAE recommended noise criteria for various applications.
2. It is expected that, in general, the stresses will vary from point to point within the flow field. 2 and their gradients in the coordinate directions. For simplicity, only the forces in the X direction are shown. Note that the stresses must be multiplied by the area on which they act to obtain the force. Summing all these forces in the X direction yields the resultant surface force in the X direction. 21) And this force, combined with the body force, δFb, yields the resultant force, δF, acting on the differential mass, δm.