introduction: designing and management of sprinkler irrigation systems depend on the situation and location of its implementation and often rely on professional and long-term tests (9). having a good irrigation system depends on knowledge of the relationship between soil, water, plants, irrigation scheduling, the required amount of irrigation water to the water-holding capacity of soil, climate...

Computational fluid dynamics (CFD) has been applied to investigate the flow field which develops above the vapor feed in packed separation columns. The uniformity of the flow below the packing is assessed by means of the coefficient of variation Kp. The resulting Kp for the standard inlet is input into an empirical correlation depending on the three most important, basically geometrical, dimens...

A recirculation aerosol wind tunnel was designed to maintain a uniform airflow and stable aerosol size distribution for evaluating aerosol sampler performance and determining particle penetration through protective clothing materials. The oval-shaped wind tunnel was designed to be small enough to fit onto a lab bench, have optimized dimensions for uniformity in wind speed and particle size dist...

(1) Background: With the development of cold chain logistics in recent years, demand for refrigerated display cases has greatly increased home and commercial markets. However, difference temperature humidity between each layer cabinet is great, which affects health consumers. In order to reduce a improve uniformity inside cabinet, an open-hole shelf designed according principle aerodynamics. (2...

In the direction where the phased array coil used in parallel magnetic resonance imaging (MRI) is perpendicular to the arrangement, sensitivity falls significantly. Moreover, in a 3.0 tesla (3T) abdominal MRI, the quality of the image is reduced by changes in the relaxation time, reinforcement of the magnetic susceptibility effect, etc. In a 3T MRI, which has a high resonant frequency, the sign...

Arainfall simulator for 5 10 mplotswasdesignedand testedwithin theEMIRE(EtudeetModeÂlisationde l'Infiltration, du Ruissellement et de l'Erosion) program. The simulator is intended to be used in the field and to reproduce natural tropical rain storms. The simulator is composed of fixed stand pipes. The nozzle (Spraying SystemsCo. 1H106SQ)mounted on the top of the pipes sprays square areas. At a ...

Endwall fillet and bulb structures are proposed in this research to improve the temperature uniformity of pin-fined microchannels. The periodical laminar flow and heat transfer performances are investigated under different Reynolds numbers and radius of fillet and bulb. The results show that at a low Reynolds number, both the fillet and the bulb structures strengthen the span-wise and the norma...

Abstract Nowadays, the development of irrigation is increasingly recognized as a necessary factor in agriculture, primarily because global warming. Depending on field conditions, most commonly used method sprinkler irrigation. The spray uniformity sprinklers installed equipment can be characterized by Christiansen-uniformity coefficient (CUc%) and distribution (DU%). Our investigations were car...