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Projects / Programmes source: ARIS

Original combined multiphase model of steam explosion premixing phase

Research activity

Code Science Field Subfield
2.13.01  Engineering sciences and technologies  Process engineering  Multi-phase systems 

Code Science Field
P240  Natural sciences and mathematics  Gases, fluid dynamics, plasmas 
Keywords
multiphase flow, multiphase model, simulation, steam explosion
Evaluation (rules)
source: COBISS
Researchers (5)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  21538  PhD Robert Bergant  Energy engineering  Researcher  2002 - 2004  42 
2.  15653  PhD Gregor Černe  Systems and cybernetics  Researcher  2001 - 2002  51 
3.  15816  PhD Andrej Horvat  Energy engineering  Researcher  2002  52 
4.  16435  PhD Boštjan Končar  Energy engineering  Researcher  2003 - 2004  367 
5.  14572  PhD Matjaž Leskovar  Energy engineering  Head  2002 - 2004  436 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,059 
Abstract
In multiphase flow different phases distributions may occur, which can not be adequately modeled neither solely with free surface flow models nor solely with multiphase flow models. Such a phases distribution occurs for example in isothermal steam explosion premixing experiments, where dispersed spheres penetrate into water and the water-air surface remains sharp. A common practice in isothermal premixing experiments modeling is to treat all three phases involved: the water, the air and the spheres phase, equally with a multiphase flow model. So the water-air surface is treated as a dispersed flow of air bubbles in water or water droplets in air, what is a physically wrong picture and because of very stiff interface coupling terms also a numerically not easy solvable task. Our idea therefore is to treat the isothermal premixing process with an original combined multiphase model, where the dispersed spheres are treated as usually with a multiphase flow model, whereas the water and air phases, which remain separated with a sharp interface, are treated with a free surface model. The purpose of the project is to develop an original combined multiphase model suited for modeling of all these phases distributions, where some phases are separated with a sharp interface, whereas the other phases are dispersed. The developed combined multiphase model will be validated on isothermal steam explosion premixing experiments.
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