The Effects of vertically temperature gradient on heavy gas dispersion in build up area

Publish Year: 1387
نوع سند: مقاله کنفرانسی
زبان: English
View: 1,804

This Paper With 20 Page And PDF Format Ready To Download

  • Certificate
  • من نویسنده این مقاله هستم

استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این Paper:

شناسه ملی سند علمی:

NICEC12_290

تاریخ نمایه سازی: 30 شهریور 1387

Abstract:

Dispersion of heavy gas is much slower than passive gas and as a result involves a more considerable hazard rang It can be arise when the gas is accidentally released at ground level or where are many obstructions in the area . Computational Fluid Dynamic (CFD) models provide us with a potential means for better understanding the factor effcting gas dispersion . At the first stage the commercial CFD code should be validated using the standard experimental results . In this paper Thorney Island and Kit Fox experiments were used as simple and complex experiments respectively in order to validate the Ansys CFX11 code . Wind speed was studied taking time , height and direction into consideration . A combination of 2D and 3D geometry was used in order to reduce the number of elements in computational domain . The vertically temperature gradient at the atmosphere was investigated . The results showed that its temperature gradient had significant effect on gas concentration histories , especially at far distances from the gas source.

Authors

Eslam Kashi

University of Sistan and Baluchestan

Farhad Shahraki

University of Sistan and Baluchestan

Davood Rashtchian

Sharif University of Technology

Amin Behzadmehr

Sharif University of Technology

مراجع و منابع این Paper:

لیست زیر مراجع و منابع استفاده شده در این Paper را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود Paper لینک شده اند :
  • ANSYS Company, 2006. CFX-11 Solver Theory Manual, CFX Ltd., Oxfordshire, ...
  • Dharmavaram, S., and Hanna, S. R., 2005. Consequence analysis _ ...
  • Hanlin, A. L., Koopman, R. P., Ermak, D. L., 2007. ...
  • Hanna, S. R. and Britter, R. E., 2002. Wind flow ...
  • Hanna, S. R., Chang, J. C., 2001. Use of the ...
  • Hanna, S. R., Chang, J. C., and Briggs, G. A., ...
  • Hanna, S. R., Hansen, O. R. and Dh armavaram, S. ...
  • Kader, B.A., 1981. Temperature and concentration profiles in fully turbulent ...
  • Kashi, E., Shahraki, F., Rashtchian, D., Mohebinia, S., 2008. Gas ...
  • Kovalets, I.V., Maderich, V.S., 2006. Numerical Simulation of Interaction of ...
  • Mavroidis, I., Andronopoulo S, S., Bartzis, J.G., Griffiths, R.F., 2007. ...
  • McQuaid, J. and Roebuck, B., 1985. Large scale field trials ...
  • Oettl, D., Goulart, A., Degrazia, G. and Anfossi, D. 2005. ...
  • Shames, I. H., 1988. Mechanics of fluids. Second edition, Mc ...
  • Sklavounos, S. and Rigas, F., 2004. Validation of turbulence models ...
  • Sklavounos, S., Rigas, F., 2006. Simulation of Coyote series trials-Part ...
  • Western Research Institute (WRI), 1998. Final Report on the 1995 ...
  • Wilkening, H., Baraldi, D., 2007. CFD modeling of accidental hydrogen ...
  • -150 -100 -50 0 50 100 150 200 250 Downrange ...
  • 50 100 150 200 250 300 time (s) ...
  • I :: _ Experimental 6000 5000 4000 3000 2000 1000 ...
  • 20 40 60 80 100 120 140 160 180 200 ...
  • _ _ _ - 1nal (z=0.6m) 3000 2000 1000 0 ...
  • نمایش کامل مراجع