Experimental Study of Characteristics of Moving Water Film within Netting.

The effects of netting characteristics, sprinkler construction and irrigation density on the moving water film in the net surface is experimentally studied. Netting surface irrigated by water was supplied through some type of sprinkler without the air flow. The film thickness in the netting is determined empirically using the amount of delayed water. The delayed water was collected by clipping. The percent error of the experiment is up to 6 %. Increasing the irrigation density correspond qualitatively to the thickness of water film according to Nusselt's formula. Using netting with minimal geometric dimensions leads to formation of ultra thin films. The film thickness of spray irrigation is reduced compared with the overflow irrigation. Recommended design of spray nozzle with holes whose diameter corresponds to manufacturability and there is one hole (nozzle) per 50 mm physically irrigated surface. Film movement is a movement in the netting structure and corresponds to fluid flow around cylinder. [ABSTRACT FROM AUTHOR]