Why soot formation is only observed in diffusion flames I need deta.pdf

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why invert an op-amp? why invert an op-amp? why invert an op-amp? Solution In real life (practical) many systems existed with negative feedback . And negative feedback improves the dc stability and also decrease gain margin . To achieve negative feedback from op amp we invert it . So generally invert op amp used..

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Why soot formation is only observed in diffusion flames? I need detailed solution
Solution
In order to arrive to the perfect answer, the term diffusion flames carries a basic criteria for the
formation of soot. Soot to be specific consists of mostly of aersols. These aerosols are produced
in different proportions w.r.t different fuels during combustion. Now coming back to Diffusion
flames, these flames are such flames in which the oxidizer combines with the fuel by diffusion.
As a result, the flame speed is limited by the rate of diffusion. As we know diffusion is the
spread of particles in such a way they are in constant motion and colliosion with each other
which inturn can be understood via Kinetic theory of gases. Due to this effect, the fuel under
combustion recieves inefficient flame which inturn leads to incomplete combustion of the fuel.
As a result, the partially burnt particles or unburnt carbon particles result in the formation of our
problematic SOOT. The soot typically produced becomes incandescent from the heat of the
flame and lends the flame its readily identifiable orange-yellow color.
Now, From the above discusion, it clearly self explained that in diffusion flames combustion
takes place at the flame surface only, where the fuel meets oxygen in the right concentration.(the
interior of the flame contains unburnt fuel.) This unburnt fuel leads to the formation of soot.
Hence the formation of Soot is well explained using a laminar diffusion or simply a diffusion
flame. Best example for diffusion flame is a candle flame, the very colour of incandescense is the
proof of formation of soot in the flame.

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