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Contracting arrangements in agribusiness procurement practices in South Africa AgEcon
Vermeulen, Hester; Kirsten, Johann F.; Sartorius, Kurt.
Contracting arrangements in agribusiness procurement practices in South Africa
Tipo: Journal Article Palavras-chave: Procurement; Contracting; Agro-processing.
Ano: 2008 URL: http://purl.umn.edu/37585
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Computational fluid dynamics (CFD) modeling of grain-water suspensions in tube CIGR Journal
Datta, Ashis Kumar; Bhunia, Kanishka; Sharma, Ranjeet.
In this study of solid-liquid flow, rice and cassava starch particles were used as the dispersed media and water was used as the carrier fluid. Experiments were carried out on slurries with solid concentrations of 5%, 10% and 15% w/w which flowed in a 13mm ID and 3 m long tube –in - tube heat exchanger. Steam was used as the heating medium. Calculated convective film to particle heat transfer coefficient (hfp) values ranged from 11 to 32 kW m -2 K -1 for cassava and rice particles with uncertainty of ± 2 kW m -2 K -1. A decrease in heat transfer coefficient values was found as a result of short residence time at the higher flow rates. To investigate the solid-liquid two-phase flow Eulerian multiphase model was adopted in simple axisymmetric geometry....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agro-processing; Computational fluid dynamics; Two-phase flow CFD Eulerian slip velocity solid-liquid flow heat transfer numerical modelling.
Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3435
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