2 research outputs found
The Coagulation Equation Under Time Reversal
In this article we examine the possibility of integrating backward
in time the coagulation equation in order to find the aerosol
particle size distribution at earlier times. In theory, time reversal
solution of the coagulation equation allows backward prediction
of past distributions in any circumstances. There are, however, a
few restrictions on the practical use of this approach. First, the
impossibility of working with infinitely small numbers in any computer
prevents retrieval of past distributions when some particle
concentrations have decayed to extremely small values. Second, the
recovery of very narrow, quasi-monodisperse distributions is also
problematic. In most practical situations in which not too narrowly
distributed and not extremely concentrated aerosols coagulate for
not too long periods of time, it is possible to predict back the original
size distribution with high accuracy.We greatly appreciate very helpful discussions with Dr. Loscertales
about some parts of this paper.Peer reviewe
The Coagulation Equation Under Time Reversal
In this article we examine the possibility of integrating backward
in time the coagulation equation in order to find the aerosol
particle size distribution at earlier times. In theory, time reversal
solution of the coagulation equation allows backward prediction
of past distributions in any circumstances. There are, however, a
few restrictions on the practical use of this approach. First, the
impossibility of working with infinitely small numbers in any computer
prevents retrieval of past distributions when some particle
concentrations have decayed to extremely small values. Second, the
recovery of very narrow, quasi-monodisperse distributions is also
problematic. In most practical situations in which not too narrowly
distributed and not extremely concentrated aerosols coagulate for
not too long periods of time, it is possible to predict back the original
size distribution with high accuracy.We greatly appreciate very helpful discussions with Dr. Loscertales
about some parts of this paper.Peer reviewe