Effects of Liquid Temperature and Viscosity on Venturi Injectors

Yuan, Zeng; Choi, Christopher Y.; Waller, Peter; Colaizzi, Paul D.

doi:10.13031/2013.3042

Cited by 17 publications

(16 citation statements)

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“…27) Development of resistance among mosquitoes has been reported in B. thuringiensis var israelensis and Bacillus sphaericus. 7,10,28) The present study also indicated the high efficacy of B. thuringiensis var israelensis against all tested field populations, indicating an absence of resistance in all 4 strains of C. quinquefasciatus in comparison to LAB. Other studies have shown the effectiveness of B. thuringiensis var israelensis for mosquito control.…”

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confidence: 64%

Development of insecticide resistance in Culex quinquefasciatus mosquito from different locations in India

et al. 2010

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Culex quinquefasciatus is a domestic mosquito known as a primary vector of lymphatic filariasis. We report the development of insecticide resistance in four populations of C. quinquefasciatus Say, 1823 in Jodhpur (JD), Bikaner (BKN), Jamnagar (JMN) and Bathinda (BTH) in India in comparison to a susceptible laboratory population against larvicides such as temephos, fenthion, Bacillus thuringiensis var. israelensis and Neemarin (azadirachtin), and adulticides such as cypermethrin, alpha cypermethrin and lambda cyhalothrin. The resistance ratio (RR) at LC 50 between field and laboratory populations was used for resistance expression. JD strain showed 10.8-, 6.94-, 5.29-and 2.82-fold resistance to temephos, fenthion, Neemarin and cypermethrin, respectively. BTH strain showed resistance to temephos, fenthion, lambda cyhalothrin, alpha cypermethrin and cypermethrin (9.06-, 2.06-, 3.33-, 4.96-and 3.19-fold, respectively). RR of BKN strain to temephos, fenthion, Neemarin and alpha cypermethrin was 5.17-, 4.12-, 4.33-and 3.04-fold, respectively; however RR was least in the JMN strain against most insecticides except alpha cypermethrin and fenthion. This study suggests that B. thuringiensis var israelensis and Neemarin may be efficient for larval control as an alternative to fenthion-and temephos-resistant strains of C. quinquefasciatus while lambda cyhalothrin and cypermethrin may be used effectively as an adulticide of this mosquito.

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Section: )supporting

confidence: 64%

Development of insecticide resistance in Culex quinquefasciatus mosquito from different locations in India

et al. 2010

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“…These decide the structure of the envisaged polymer and the healing conditions as well. Only when the polymer is dynamically bonded, can the disconnected bonds be simultaneously recombined 11. As a result, crack healing is allowed to be completed in single step ( e.g.…”

Section: Introductionmentioning

confidence: 99%

A seawater triggered dynamic coordinate bond and its application for underwater self-healing and reclaiming of lipophilic polymer

et al. 2016

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“…Better fertilizer distribution in the greenhouse experiment was obtained with Venturi one (Bracy R P et al, 2003). The effect of chemical temperature change on the injection flow rate of a Venturi injector was evaluated by Yuan Z et al (2000). Manzano Juárez J et al (2005) carried out the study on hydraulic modeling of Venturi injector using CFD, with its predictions for the total pressuer losses had a small error, less than 2%.…”

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confidence: 99%

CFD Simulation to the Flow Field of Venturi Injector

Huang

Miao

2009

IFIP Advances in Information and Communication Technology

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Abstract:Venturi injector is widely used in fertigation system due to its obvious advantages such as cheap and robust system without mobile pieces, simple structure, convenient to operation, stable performance, needless of external energy for operation etc. At present, the hydraulic parameters such as suction capacity (injection rate) for the most of the Venturi injectors produced domestically are not very desirable. In this paper, CFD (Computational Fluid Dynamics) method was used to simulate the inner flow field of the Venturi injectors, and the relationships among the structure parameters (i.e., throat length L, throat diameter D, slot diameter Da) and suction capacity q, and the optimal structure sizes of the Venturi injector were analyzed. The results show that when the inlet pressure and the slot position are kept unchanged as the sample one, the suction capacity of Venturi injector increases with the decrease of throat diameter D and throat length L, and the increase of slot diameter Da; while keeping the slot diameter Da, throat diameter D and throat length L unchanged, the suction capacity of Venturi injector q increases with the increase of inlet pressure P. The optimal combination of the structural parameters in this size was selected as follows: throat diameter D=8mm, slot diameter Da=18.5mm, and throat length L=14mm. In this case, the suction capacity of the Venturi injector q=1.203m3/h. The results can provide theoretic support for domestic Venturi injector research, design and manufacturing.

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Effects of Liquid Temperature and Viscosity on Venturi Injectors

Cited by 17 publications

References 0 publications

Development of insecticide resistance in Culex quinquefasciatus mosquito from different locations in India

Development of insecticide resistance in Culex quinquefasciatus mosquito from different locations in India

A seawater triggered dynamic coordinate bond and its application for underwater self-healing and reclaiming of lipophilic polymer

CFD Simulation to the Flow Field of Venturi Injector

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