Introduction

Temperature evolution

Benzene's mass fraction evolution (C6H6)

Oxygene's mass fraction evolution ( O2)

Carbone Dioxyde`s mass fraction evolution ( CO2 )

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Introduction

To track the evolution of the chimical reaction during the time of the simulation, has been the experience is done with a unsteady option.

This allow us to show the evolution of the Temperature and mass fractions of different speices involved in the reaction.

The folloween pictures correspond respectively to :

0.001s , 0.01s and 0.1s


Temperature evolution :

the initial value of the temperature is set equal to 800 k.

after 0.001s from the begining of the simulation the temperature keep constant in almost the hole space : this shows that the reaction doesn't begin yet because the speices don't have been mixed yet .

after 0.01 seconds the reaction begin and the temperature increase quickly to reach 1570 k in the zone where the explosif reaction hapens.

after 0.1 seconds we see that temperature has increased a lot to reach 5000 k, in a zone of space witch is confined in the bottom of the square. In fact the relatively cold temperature in the other zones is due the cold flow crossing this zone without reacting.

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benzene's mass fraction evolution (C6H6)

after 0.01 seconds the reaction have already started. we see the flow of the benzene at the right side. But it doesn't reach the left side. it seem like if there was a boundary layer separationg the benzene from the oxygene. Its due to the other component of the mixture wich keep them separated. the result of this is that we see that after 0.1 seconds the benzene reamains confined in the side.

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Oxygene's mass fraction evolution ( O2)

no comment...

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carbone Dioxyde`s mass fraction evolution ( CO2 )

progressively we see the apparition of carbone dioxide but it's confined in the bottom of the cylinder.and weWe can notice here a n other time the confinement reactant at the bottom of the square.

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