Breakup Dynamics and Near Nozzle Spray Fluctuations in a Twin-Jet Cross-Flow Airblast Atomizer

Patil, Shirin; Sahu, Srikrishna

doi:10.1615/atomizspr.2019030177

Cited by 11 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The state of the fluid flow is turbulent inside the sprinkler. The standard turbulence model k ‐ ε can be written as (Patil & Sahu, 2019; Wei et al, 2006; Yan et al, 2009)

\frac{D ((), ρk)}{Dt} goodbreak= P goodbreak- italicρε goodbreak+ \frac{\partial}{\partial x_{i}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{k}}) \frac{\partial k}{\partial x_{j}}),

\frac{D ((), ρk)}{Dt} goodbreak= P goodbreak- italicρε goodbreak+ \frac{\partial}{\partial x_{i}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{k}}) \frac{\partial k}{\partial x_{j}}),

\frac{D ((), ρε)}{Dt} goodbreak= C_{1 ε} \cdot P goodbreak- C_{2 ε} ρ \frac{ε^{2}}{k} goodbreak+ \frac{\partial}{\partial x_{j}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{ε}}) \frac{\partial ε}{\partial x_{j}}),

μ_{t} goodbreak= C_{μ} ρ \frac{k^{2}}{ε},

where k is turbulent kinetic energy, ε is the turbulent dissipation rate,

μ_{t}

is the turbulent viscosity coefficient,

ρ

is the fluid density, and

P

is the turbulent kinetic energy generation term. The values of the model constants

C_{1 ε}

C_{2 ε}

…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Optimization and numerical simulation of the internal flow field of water–pesticide integrated microsprinklers

Liu

Hussain

Wang

et al. 2023

Irrigation and Drainage

View full text Add to dashboard Cite

A new type of water–pesticide integrated microsprinkler has been developed in this study. Microsprinklers can irrigate crop roots to meet the irrigation index demand under low‐pressure conditions and apply pesticides on the backs of crop leaves to meet the spraying pesticide index demand under medium‐pressure conditions. In this paper, the structure and working principle of the water–pesticide integrated microsprinkler are discussed, and the key structural parameters are the number and diameter of the small round holes and the number and width of bevel grooves. Computational fluid dynamics (CFD) numerical simulations were performed to analyse the influence and variation in the key structural parameters on the microsprinkler flow field. The optimized structural parameters of the microsprinkler were determined: The outlet nozzle diameter was 3 mm, with three small round holes of 2 mm diameter and three bevel grooves of 0.8 mm width. The hydraulic performance of the optimized sprinkler and original sprinkler (outlet nozzle diameter was 2.5 mm, with two small round holes of 3 mm diameter and four bevel grooves of 1 mm width) were compared under different working pressure conditions. The results showed that the wetted radius and uniformity coefficient of the optimized sprinkler increased by 23% and 16%, respectively.

show abstract

“…The state of the fluid flow is turbulent inside the sprinkler. The standard turbulence model k ‐ ε can be written as (Patil & Sahu, 2019; Wei et al, 2006; Yan et al, 2009)

\frac{D ((), ρk)}{Dt} goodbreak= P goodbreak- italicρε goodbreak+ \frac{\partial}{\partial x_{i}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{k}}) \frac{\partial k}{\partial x_{j}}),

\frac{D ((), ρk)}{Dt} goodbreak= P goodbreak- italicρε goodbreak+ \frac{\partial}{\partial x_{i}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{k}}) \frac{\partial k}{\partial x_{j}}),

\frac{D ((), ρε)}{Dt} goodbreak= C_{1 ε} \cdot P goodbreak- C_{2 ε} ρ \frac{ε^{2}}{k} goodbreak+ \frac{\partial}{\partial x_{j}} ([], ((), μ goodbreak+ \frac{μ_{normalt}}{σ_{ε}}) \frac{\partial ε}{\partial x_{j}}),

μ_{t} goodbreak= C_{μ} ρ \frac{k^{2}}{ε},

where k is turbulent kinetic energy, ε is the turbulent dissipation rate,

μ_{t}

is the turbulent viscosity coefficient,

ρ

is the fluid density, and

P

is the turbulent kinetic energy generation term. The values of the model constants

C_{1 ε}

C_{2 ε}

…”

Section: Methodsmentioning

confidence: 99%

“…The state of the fluid flow is turbulent inside the sprinkler. The standard turbulence model k-ε can be written as (Patil & Sahu, 2019;Wei et al, 2006;Yan et al, 2009)…”

Section: Turbulence Model and Boundary Conditionsmentioning

confidence: 99%