Combustion in a closed system. -- CFD Online Discussion Forums

December 6, 2004, 14:10	Combustion in a closed system.	#1
Jim Guest Posts: n/a	Dear all, If I have a completely closed system (a cube with all six sides walls) that contained a premixed fuel and air (at stoichiomteric ratio) and I 'burn' it, what happens to the density and the pressure? The volume is fixed and so is the mass. Therefore, if the density of the mixture drops due to combustion, then the volume has to increase unless the pressure increases and forces the density back to its original value. Is this correct? Does this occur instantaneously? What is the interaction (and time history) of the pressure and density.

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