TY - JOUR A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter T1 - Underground gas pipeline explosion and fire: CFD based assessment of foreseeability N2 - Scenarios of underground gas pipeline failure, crater formation, dispersion of gas, explosion and subsequent fires are investigated with semi-empirical and with CFD (Computational Fluid Dynamics) modelling. In order to strengthen the accident based learning approaches present investigations are performed in the context of recent GAIL (Gas Authority of India Limited) natural gas pipeline incident occurred in India. The foreseeability of damages to lives of people and assets due to explosion overpressure and thermal radiation are assessed. The released gas is considered as slightly dense-than-air i.e. 1.5 times. Depending on the LFL (Lower Flammability Limit) of gas the dispersion diameter and heights are predicted which followed the visual evidences appropriately. The model was furthermore tested with an even denser medium and was found to be worked well there too. The estimated explosion overpressures with the standard methods and also with CFD reproduced the scenario nicely. The effects of congestion VBR (Volume Blockage Ratio) in form of vegetation on stable atmospheric boundary layer flow is analysed and its contribution towards turbulence and hazard enhancement is studied. It is found that the major source of fatalities was higher thermal radiation emitted by pool fires of methane. The estimated thermal safety distances clearly demonstrate the ignorance/under estimation of likelihood and consequence of such hazardous events. For such incidents CFD demonstrated a strong capability to assess the pre or/and post events foreseeabilities within a reasonable amount of time and with an acceptable level of accuracy meeting the industrial needs for risk analysis. KW - Natural gas KW - Underground pipeline KW - Dense gas dispersion KW - Explosion and fire KW - CFD KW - Safety distance PY - 2015 DO - https://doi.org/10.1016/j.jngse.2015.04.010 SN - 1875-5100 VL - 24 SP - 526 EP - 542 PB - Elsevier CY - Amsterdam [u.a.] AN - OPUS4-33671 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - On dynamics of organic peroxides pool flames T2 - 35th National Conference on Fluid Mechanics and Fluid Power CY - Bangalore, India DA - 2008-12-11 PY - 2008 AN - OPUS4-18684 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter A1 - Schönbucher, A. ED - K.N. Seetharamu, ED - T.R. Seetharam, ED - Pradeep G. Hedge, ED - H.M. Mallikarjuna, T1 - On the dynamics of organic peroxide pool flames T2 - 35th National Conference on Fluid Mechanics and Fluid Power CY - Bangalore, India DA - 2008-12-11 KW - Peroxide and kerosene pool flames KW - Froude number KW - CFD (Computational Fluid Dynamics) PY - 2008 IS - FMFP 08 - 076 SP - 643 EP - 650 CY - Bangalore, India AN - OPUS4-18690 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - Experimental and numerical investigations of pool flames of organic peroxides T2 - 1st Peer Training - Meeting on Applied Scientific Computing and Tools CY - Rome, Italy DA - 2008-10-21 PY - 2008 AN - OPUS4-18640 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - A numerical revisit of large organic peroxide fire test T2 - Viertes gemeinsames wissenschaftliches Kolloquium der Uni Duisburg-Essen, Institut für technische Chemie I, und der BAM, Abteilung II "Chemische Sicherheitstechnik" CY - Essen, Germany DA - 2007-11-29 PY - 2007 AN - OPUS4-17770 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - Pool flames of organic peroxides - experimental and CFD study T2 - 32nd International Symposium on Cumbustion CY - Montreal, Canada DA - 2008-08-03 PY - 2008 AN - OPUS4-17771 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - An introduction to pool fire characteristics of organic peroxides T2 - 4th Joint Colloquium of the Department II Chemical Safety Engineering of BAM and the Institute of Technical Chemistry I of the University of Duisburg-Essen, BAM CY - Berlin, Germany DA - 2009-07-24 PY - 2009 AN - OPUS4-19784 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan T1 - Characterization of large pool fires of organic compounds containing oxygen atoms T2 - 13th International Symposium on Loss Prevention and Safety Promotion in the Process Industries CY - Bruges, Belgium DA - 2010-06-06 PY - 2010 AN - OPUS4-21435 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter A1 - Schönbucher, A. ED - Suter, G. ED - de Rademaeker, E. T1 - Characterization of large pool fires of organic compounds containing oxygen atoms T2 - 13th International symposium on loss prevention and safety promotion in the process industries CY - Brugge, Belgium DA - 2010-06-06 KW - Pool fire KW - Hydrocarbons KW - Alcohols KW - Ketones KW - Organic peroxides KW - Fire characteristics PY - 2010 SN - 978-90-76019-291 VL - I SP - 365 EP - 372 CY - Brugge, Belgium AN - OPUS4-21552 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Mishra, Kirti Bhushan A1 - Wehrstedt, Klaus-Dieter A1 - Schönbucher, A. T1 - Pool and tank fires - Are we really prepared? N2 - The industrial fire accidents e.g. Buncefield (2005) and Jaipur (2009) have come up with several issues concerning safe storage and transportation of flammable liquids. The pre and post fire consequences are therefore important to be analyzed prior to the handling of flammable fuels. Pool or/and tank fire is the most often seen scenario after the leak/spill of liquid fuel. An overview of the typical scenarios from large hydrocarbon and organic peroxide pool fires and their respective safety distances for the people and the infrastructure are the important subjects of this paper. T2 - 8th Asia-Pacific conference on combustion CY - Hyderabad, India DA - 2010-12-10 KW - Flammable liquids KW - Pool fire KW - Safety distance KW - Organic peroxides PY - 2010 SP - 697 EP - 702 AN - OPUS4-23004 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -