paraffin wax deposition and fouling

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Ia the paraffin wax deposition and fouling studies the effect
oz :uma veocaty nas oeen aemonstrated
increased velocity decreases
the neposition,
The effects of concentration and temperature have
also been shown, alas, not -as clearly.
lthough increased concentra
tion and decreased temperature increase deposition independently,
they are i:aea cy a soluozlaty reataon,
The efzects of concentra—
taon ann temrerature are triereiore ootn characterized cy waere a
zouling wax partacle or crystal comes out of soiution.
Jhetner or
not it :orr.s an tac oz a rassage or an tne oounnary layer. n
all the present erperimental work the solution bulk temperature was
kept above the cloud roint.
There are two significant temperatures at which changes take
place near a cola neposatior. wall.
At the cloua pcant a wax
partacne is formed and. at the roar point solac. wax s formen
Between znese two points taere exists a &urry of wax crystals an
erosene.
The tearerature ais;rloution zrom oulk to wall an a
foaling solution is therefore most important,
The purpose of the rres.ent section is to investigate the
likely temperature distribution and to see how that knowledge
could halp in e::oiainirg the deposition and foaling mechanism.
computer p:ogra::. caed P
(Prozames) was c.evenopen to
calculate tne velocity ann temrerature oro:ales an turo.en; tare
flow.
The boundary layer theory used in the program is given in
pendx 7 and -.tpendi S givos details of the program. The
was cm’:e_.oaen zor tne Dara::in wax an erosene sowataon.3
uea ifl tIe o.l:ng swanacs. wac comwa..r ‘:cr. was carraec. out
at the Oowatr Oertre, ‘IniverLty of 3irmingnam, and at the Central
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