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Year 2011, Volume: 3 Issue: 3, 15 - 22, 01.09.2011

R. Daneshfaraz S. Sadeqfam M. Majedi-asl

Abstract

References

  • [1] Koutitas, G., 1983. Element of Computational Hydraulics, p. 138.
  • [2] Zandi, Y., 2006. Differences between hydraulic dead flaws of control methods resulted from water hammer, National Conferences of Water Managers, Shahid Chamran University, Ahvaz, Iran.
  • [3] Musavai-Jahromi, H., 2006. Simulation of hydraulic event of water hammer in multidiameter water transformation pipes with different composition, National Conferences of Water Managers, Shahid Chamran University, Ahvaz, Iran.
  • [4] Daneshfaraz, R., Barzegar, T., Derakhshan, M., 2009. Advanced numerical methods for solving fluids engineering problems, Amidi Press, Tabriz, Iran, p. 244.
  • [5] The website of Southern Tehran Mechanic Society.
  • [6] Matlab's Help.

The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe

Year 2011, Volume: 3 Issue: 3, 15 - 22, 01.09.2011

R. Daneshfaraz S. Sadeqfam M. Majedi-asl

Abstract

Water Hammer problems are complex and time-consuming even with very simple calculation method and usual boundary conditions. One of the important procedures for solving the governing equations (PDE) of unsteady flows is finite difference method. One procedure for simplifying the governing equations is neglecting the nonlinear terms such as V∂x ∂H ,V ∂x ∂V without considering the amount of errors that are created with this process. Therefore in this paper, the phenomenon of water Hammer in the tank, pipe and valve system has been
investigated in two manners, one with full equations and other with neglecting the nonlinear terms. For doing
this, an FDM code has been written in MATLAB and the amounts of head along the pipe in sequential times and
the differences between two manners have been given in diagrams. The obtained results indicate that for iron
pipe with different friction coefficient (smooth, perennial and worn) by decreasing Chezy coefficient, wave
damping increases and the effect of nonlinear terms decreases.

Keywords

Water Hammer Non-linear and Linear Terms Chezy Coefficient Tank and Pipe System

References

  • [1] Koutitas, G., 1983. Element of Computational Hydraulics, p. 138.
  • [2] Zandi, Y., 2006. Differences between hydraulic dead flaws of control methods resulted from water hammer, National Conferences of Water Managers, Shahid Chamran University, Ahvaz, Iran.
  • [3] Musavai-Jahromi, H., 2006. Simulation of hydraulic event of water hammer in multidiameter water transformation pipes with different composition, National Conferences of Water Managers, Shahid Chamran University, Ahvaz, Iran.
  • [4] Daneshfaraz, R., Barzegar, T., Derakhshan, M., 2009. Advanced numerical methods for solving fluids engineering problems, Amidi Press, Tabriz, Iran, p. 244.
  • [5] The website of Southern Tehran Mechanic Society.
  • [6] Matlab's Help.
There are 6 citations in total.

Details

Other ID JA65ZC24HM
Journal Section Articles
Authors

R. Daneshfaraz This is me

S. Sadeqfam This is me

M. Majedi-asl This is me

Publication Date September 1, 2011
Published in Issue Year 2011 Volume: 3 Issue: 3

Cite

APA Daneshfaraz, R., Sadeqfam, S., & Majedi-asl, M. (2011). The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe. International Journal of Engineering and Applied Sciences, 3(3), 15-22.
AMA Daneshfaraz R, Sadeqfam S, Majedi-asl M. The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe. IJEAS. September 2011;3(3):15-22.
Chicago Daneshfaraz, R., S. Sadeqfam, and M. Majedi-asl. “The Effect of Non-Linear Terms on the Process of Computing Water Hammer With Regard to Friction Coefficient for Diffrent Cast Iron Pipe”. International Journal of Engineering and Applied Sciences 3, no. 3 (September 2011): 15-22.
EndNote Daneshfaraz R, Sadeqfam S, Majedi-asl M (September 1, 2011) The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe. International Journal of Engineering and Applied Sciences 3 3 15–22.
IEEE R. Daneshfaraz, S. Sadeqfam, and M. Majedi-asl, “The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe”, IJEAS, vol. 3, no. 3, pp. 15–22, 2011.
ISNAD Daneshfaraz, R. et al. “The Effect of Non-Linear Terms on the Process of Computing Water Hammer With Regard to Friction Coefficient for Diffrent Cast Iron Pipe”. International Journal of Engineering and Applied Sciences 3/3 (September 2011), 15-22.
JAMA Daneshfaraz R, Sadeqfam S, Majedi-asl M. The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe. IJEAS. 2011;3:15–22.
MLA Daneshfaraz, R. et al. “The Effect of Non-Linear Terms on the Process of Computing Water Hammer With Regard to Friction Coefficient for Diffrent Cast Iron Pipe”. International Journal of Engineering and Applied Sciences, vol. 3, no. 3, 2011, pp. 15-22.
Vancouver Daneshfaraz R, Sadeqfam S, Majedi-asl M. The Effect of Non-Linear Terms on the Process of Computing Water Hammer with Regard to Friction Coefficient for Diffrent Cast Iron Pipe. IJEAS. 2011;3(3):15-22.

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