Convective Diffusion from Strip-like Microprobes into Colloidal Suspensions

0338969 - ÚCHP 2011 RIV NL eng J - Journal Article
Wein, Ondřej
Convective Diffusion from Strip-like Microprobes into Colloidal Suspensions.
International Journal of Heat and Mass Transfer. Roč. 53, 9-10 (2010), s. 1856-1867. ISSN 0017-9310. E-ISSN 1879-2189
R&D Projects: GA ČR GA104/08/0428; GA ČR GA104/09/0972
Institutional research plan: CEZ:AV0Z40720504
Keywords : electrodiffusion friction probes * microdisperse fluid flow * longitudinal diffusion
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 1.898, year: 2010

Full equations of convective diffusion are solved numerically for a strip-like (2D) electrodiffusion friction probe in a stream of microdisperse liquid, assuming a non-linear near-to-wall velocity profile ranging from simple shear flow (p = 1) to ideal slip (p = 0). The range of generalized Peclet number H from H = 0.01 (almost pure spatial diffusion) to H = 100 (diffusion layer with negligible longitudinal diffusion) covers all cases of a possible experimental relevance. The main result is expressed as a relative deviation of actual total diffusion flux N from its diffusion-layer approximation N-DLA,N- Psi = N/NDLA - 1.
Permanent Link: http://hdl.handle.net/11104/0182610