Bibliographic Citation
| Document | For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field. For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability. |
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| DOI | http://dx.doi.org/10.1002/aic.690410903 |
| Title | Wave model for longitudinal dispersion: Analysis and applications |
| Creator/Author | Westerterp, K.R. ; Dil`man, V.V. ; Kronberg, A.E. ; Benneker, A.H. [Twente Univ. of Technology, Enschede (Netherlands)] |
| Publication Date | 1995 Sep 01 |
| OSTI Identifier | OSTI ID: 118813 |
| Other Number(s) | Journal ID: AICEAC; ISSN 0001-1541; TRN: TRN: IM9546%%214 |
| Resource Type | Journal Article |
| Resource Relation | Journal Name: AIChE Journal; Journal Volume: 41; Journal Issue: 9; Other Information: PBD: Sep 1995 |
| Subject | 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; DISPERSIONS; FLOW MODELS; CHEMICAL REACTORS; FICK LAWS; CONCENTRATION RATIO; FLUID MECHANICS; MULTIPHASE FLOW |
| Description/Abstract | An analysis and applications of the wave model for longitudinal dispersion are presented. Asymptotic forms of the wave model are considered and analytical solutions of typical linear stationary and nonstationary problems of chemical reactor engineering interest are obtained and compared to those for the Fickian dispersion model. The wave model leads to efficient analytical solutions for linear problems, which in principle differ from the solutions of the Fickian dispersion model; only for slowly varying concentration fields do the solutions of both models approach each other. Spatial and time moments of the concentration distribution are obtained for pulse-dispersion problems; the first three spatial moments of the mean, variance, and skewness have exact, large-time asymptotic forms in the case of Taylor dispersion. Old experiments that could not be explained with the standard dispersion model are reconsidered and explained: the change with time of the variance of a concentration pulse when the flow direction is reversed and the difference in values of the apparent axial dispersion coefficient and the back-mixing coefficient in a rotating disk contactor. The experimental determination of model parameters is discussed. |
| Country of Publication | United States |
| Language | English |
| Format | Medium: X; Size: pp. 2029-2039 |
| System Entry Date | 2008 Feb 04 |
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Last Updated: 11/19/2009