FLOW DIFFUSION CHAMBER IS A NEW TOOL FOR VAPOR NUCLEATION RATE MEASUREMENTS

Michael ANISIMOV, Elena FOMINYKH

Abstract

The  quality  of  the  vapour  gas  nucleation  has  been increased  substantially  in  1980th. In addition to the all known for that time experimental techniques the Flow Diffusion Chamber (FDC) was  developed.    Several  articles  devoted  to  FDC  were  published  in  Russian  scientific  journals beginning 1978 [Anisimov  and co-workers (1978a,b), etc].   The scheme of FDC involves using the hot laminar vapor-gas flow within the colder boundaries which is similar, for example, to D. Sinclair and
V.K.  La-Mer  generator  of  monodispersed  particles.    The  current  FDC  scheme  can  be  used  for  the vapor  nucleation  rate  measurements  at  the  total  pressures  from  0.3  to  3.0  Atm.  FDC  has  been reproduced  in  Finland,  USA,  Japan,  Czech  Republic,  Germany,  Austria,  and  in  several  research
groups  at  other  countries.    A  conceptual  problem  in  vapor  nucleation  is  its  treatment  as  a  single component problem.    In  general,  one  should  consider the  carrier  gas-vapor  nucleation  as  a  binary nucleation.  In  order  to test  the  behaviour  of  an  experimental  set-up, it  is  useful to  have a  standard system that can be measured over a range of typically employed nucleation conditions. The current
state of Vapor – Gas nucleation rate measurements is published recently by Anisimov et al. (2009).

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