Computation Transport Phenomena in Chemical Engineering. Numerical Analysis of Heat Transport Phenomena during the Collision of a Liquid Droplet on a Substrate.

<strong></strong>James Wei, profesor del «Department of Chemical Engineering-MIT» empleó el concepto de paradigma en 1988, introducido por T. Kuhn, para caracterizar las etapas evolutivas de la ingeniería química. Wei identificó 3 períodos: el preparadigmático, un primer paradigma que lo relaciona con la publicación del texto Principles of Chemical Engineering, y un segundo paradigma asociado al texto: Transport Phenomena, de Bird, Stewart and Lightfoot, en 1960. Los paradigmas de Wei son reduccionistas y limitados y deben ser ampliados y actualizados. En el presente trabajo se identifican 3 etapas: el preparadigmático, el paradigma de las operaciones unitarias, y el paradigma de la ciencia de la ingeniería química. Se hace referencia a las nuevas fronteras de la ingeniería química y a la necesidad de incluir nuevas disciplinas académicas y nuevas técnicas de enseñanza-aprendizaje.

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Electronic and heat transport phenomena in the nanogranular thiospinel Fe3S4

Physical Review B ◽

10.1103/physrevb.103.245129 ◽

2021 ◽

Vol 103 (24) ◽

Author(s):

Karel Knížek ◽

Miroslav Soroka ◽

Ondřej Kaman ◽

Jarmila Kuličková ◽

Petr Levinský ◽

...

Keyword(s):

Heat Transport ◽

Transport Phenomena

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Numerical Analysis of Influence of Roughness of Material Surface on High-Speed Liquid Droplet Impingement

Journal of Pressure Vessel Technology ◽

10.1115/1.4043320 ◽

2019 ◽

Vol 141 (3) ◽

Cited By ~ 1

Author(s):

Hirotoshi Sasaki ◽

Yuka Iga

Keyword(s):

Numerical Analysis ◽

High Speed ◽

Erosion Rate ◽

Liquid Droplet ◽

Material Surface ◽

Liquid Droplets ◽

Fluid Machinery ◽

Droplet Impingement ◽

Surface Liquid ◽

Droplet Impingement Erosion

This study explains why the deep erosion pits are formed in liquid droplet impingement erosion even though the droplets uniformly impinge on the entire material surface. Liquid droplet impingement erosion occurs in fluid machinery on which droplets impinge at high speed. In the process of erosion, the material surface becomes completely roughened by erosion pits. In addition, most material surface is not completely smooth and has some degree of initial roughness from manufacturing and processing and so on. In this study, to consider the influence of the roughness on the material surface under droplet impingement, a numerical analysis of droplets impinging on the material surface with a single wedge and a single bump was conducted with changing offsets between the droplet impingement centers and the roughness centers on each a wedge bottom and a bump top. As results, two mechanisms are predicted from the present numerical results: the erosion rate accelerates and transitions from the incubation stage to the acceleration stage once roughness occurs on the material surface; the other is that deep erosion pits are formed even in the case of liquid droplets impinging uniformly on the entire material surface.

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