Browsing by Author "Picologlou, B. F."
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Item Biofilm growth and hydraulic performance(1980) Picologlou, B. F.; Zelver, Nick; Characklis, William G.An experimental investigation of the deleterious effect of microbial slime layers on the hydraulic performance of water conduits is presented. The underlying mechanisms that lead to an increase of frictional losses in the conduit are explored and their relative importance is discussed. It is shown that although the slime layer is viscoelastic and filamentous, its effect on frictional resistance can be adequately represented through an increase in rigid equivalent sand roughness of the conduit wall.Item Hydraulic deterioration due to microbial slime growths(1978) Characklis, William G.; Zelver, Nick; Picologlou, B. F.Item Influence of Fouling Biofilms on Heat Transfer(1981-07) Characklis, William G.; Nimmons, M. J.; Picologlou, B. F.In heat exchange equipment, fouling biofilm formation causes a significant energy loss by increasing heat transfer resistance. This paper describes experiments which quantify the influence of fouling biofilms on heat transfer resistance under controlled laboratory conditions. Experimental results compare well with a rather simple mathematical model employing friction factor, biofilm thickness, wall temperature, bulk temperature, and fluid properties as inputs. Limitations of the experimental apparatus and mathematical model are discussedItem Measurement of the formation and destruction of primary biofouling films(1978-08) Characklis, William G.; Picologlou, B. F.