Development of a Mathematical Model and 3d Numerical Simulation of the Internal Flow in a Conical Swirl Atomizer

Rivas, Julio R. Ronceros; Pimenta, Amílcar Porto; Rivas, Gustavo Adolfo Ronceros

doi:10.1615/atomizspr.2013007495

Cited by 16 publications

(7 citation statements)

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“…The exploration undertaken in this research extends to the meticulous evaluation and viability assessment of this novel preservation technique. This investigation capitalizes on the efficacy of dual or bi-centrifugal atomization mechanisms, denoted as duplex atomizers, employing centrifugal or pressure-swirl atomizers [3]. The discernible conical geometry exhibited by the resultant spray from these atomizers facilitates immediate interaction between the atomized substances [4,5].…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Therefore, an approach is sought that transforms everything into a function of the annular section coefficient (ϕ) [12]. As a result, the decision was made to utilize a conical model as a foundation, as depicted in the article "Development of a mathematical model and 3D numerical simulation of the internal flow in a conical swirl atomizer" [3]. In this context, Equation ( 2) is a derivation of the conical geometric parameter equation (A c ) (Equation ( 1)) [3].…”

Section: Mathematical Modelmentioning

confidence: 99%

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Design of a Cryogenic Duplex Pressure-Swirl Atomizer through CFDs for the Cold Conservation of Marine Products

Ayala,

Rivera,

Ronceros

et al. 2023

Fluids

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The following article proposes the design of a bi-centrifugal atomizer that allows the interaction of sprays from two fluids (water and liquid nitrogen). The liquid nitrogen (LN2) is below −195.8 °C, a temperature low enough for the nitrogen, upon contact with the atomized water, to cause heat loss and bring it to its freezing point. The objective is to convert the water droplets present in the spray into ice. Upon falling, the ice particles can be dispersed, covering the largest possible area of the seafood products intended for cold preservation. All these phenomena related to the interaction of two fluids and heat exchange are due to the bi-centrifugal atomizer, which positions the two centrifugal atomizers concentrically, resulting in the inevitable collision of the two sprays. Each of these atomizers will be designed using a mathematical model and CFDs tools. The latter will provide a better study of the flow behavior of both fluids inside and outside the bi-centrifugal atomizer. Hence, the objective revolves around confirming the validity of the mathematical model through a comparison with numerical simulation data. This comparison establishes a strong correlation (with a maximum variance of 1.94% for the water atomizer and 10% for the LN2 atomizer), thereby ensuring precise manufacturing specifications for the atomizers. It is important to highlight that, in order to achieve the enhanced resolution and comprehension of the fluid both inside and outside the duplex atomizer, two types of meshes were utilized, ensuring the utilization of the optimal option. Similarly, the aforementioned meshes were generated using two distinct software platforms, namely ANSYS Meshing (tetrahedral mesh) and ANSYS ICEM (hexahedral mesh), to facilitate a comparative analysis of the mesh quality obtained. This comprehension facilitated the observation of water temperature during its interaction with liquid nitrogen, ultimately ensuring the freezing of water droplets at the atomizer’s outlet. This objective aligns seamlessly with the primary goal of this study, which revolves around the preservation of seafood products through cold techniques. This particular attribute holds potential for various applications, including cooling processes for food products.

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Section: Mathematical Modelmentioning

confidence: 99%

Section: Mathematical Modelmentioning

confidence: 99%

Design of a Cryogenic Duplex Pressure-Swirl Atomizer through CFDs for the Cold Conservation of Marine Products

Ayala,

Rivera,

Ronceros

et al. 2023

Fluids

View full text Add to dashboard Cite

show abstract

“…Zhang et al [11] proposed an empirical correlation relating the spray cone angle with Reynolds number by Buckingham pi theorem [12] and experimental data. Rivas et al [13] also claimed that they obtained a semi-empirical correlation to predict the spray cone angle with the consideration of liquid viscosity. In our previous study, an improved semi-empirical correlation is derived based on boundary layer theory to predict the viscous spray cone angles [8].…”

Section: Introductionmentioning

confidence: 99%

Available Simplified Semi-empirical Correlation to Predict Hollow Spray Cone Angle for Practical Pressure Swirl Atomizers with Viscous liquid

Sun

Deng

Huang

et al. 2021

ICLASS

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Pressure swirl atomizers are widely utilized in engineering, agriculture and medical treatment. The spray cone angle is one of the most important parameters for pressure swirl atomizers. The spatial distribution of sprays and droplets is closely dependent on the spray cone angle. In our previous study, an improved semi-empirical correlation is derived based on the rotational kinetic energy loss caused by the friction to predict the viscous spray cone angles. However, this correlation is relatively complicated and not convenient for the quick prediction of the hollow spray cone angle. In order to achieve quick prediction of the hollow spray cone angle with acceptable prediction accuracy, a simplified semi-empirical correlation is proposed in the present study. This simplified semi-empirical correlation is obtained by simplifying our previous correlation based on proper assumptions. Further, this simplified semi-empirical correlation could accommodate the effects of geometrical parameters, operating conditions and liquid properties on the spray cone angle. Besides, a series of experiments with variations of geometrical parameters, operating conditions and liquid properties have been done to validate the simplified semi-empirical correlation. The hollow spray cone angles predicted by this simplified semi-empirical correlation agree well with the experimental results. The prediction uncertainties could be within ±15% for all cases.

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Section: Introductionmentioning

confidence: 99%

“…A large amount of valuable internal flow field information, such as the pressure, velocity, and liquid film thickness of the injector exit, has been obtained by employing the VOF model. [12][13][14][15] In spite of the large number of interesting results 16,17 on swirl injectors obtained thus far, few have been based on open-end swirl injectors. In addition, systematic studies on the geometric and operating parameters affecting the atomization characteristics have been lacking.…”

Section: Introductionmentioning

confidence: 99%

Effect of geometric and operating parameters on the spray characteristics of an open-end swirl injector

Chen

Yang

Wang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part G:

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To study the influence of geometric and operating parameters on the spray characteristics of an open-end swirl injector, seven injectors with different tangential inlet diameters ( D p) and injector length to injector orifice diameter ( L/D) ratios were tested and simulated. Using high-speed backlight, the evolution laws of liquid film thickness, discharge coefficient, spray cone angle, breakup length, and velocity distribution in the swirl chamber under different geometric and operating parameters were captured after unified image processing. Low-injection pressure drop is directly proportional to the discharge coefficient and the spray cone angle. When the injection pressure drop approaches or reaches a critical value of 0.4 MPa, the discharge coefficient and spray cone angle remain nearly constant with maximum fluctuations of 1% and 5%, respectively. With an increase in the geometric characteristic constant A, the liquid film thickness, discharge coefficient, breakup length, and velocity in the swirl chamber decrease, whereas the spray cone angle increases. As the viscous effect increases for increasing L/D, the discharge coefficient and breakup length increase, whereas the spray cone angle decreases. Based on experiment results, empirical formulas for the discharge coefficient, spray angle, and breakup length were put forward as reference for engineering applications, including the effect of the geometric and operating parameters.

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Development of a Mathematical Model and 3d Numerical Simulation of the Internal Flow in a Conical Swirl Atomizer

Cited by 16 publications

References 0 publications

Design of a Cryogenic Duplex Pressure-Swirl Atomizer through CFDs for the Cold Conservation of Marine Products

Design of a Cryogenic Duplex Pressure-Swirl Atomizer through CFDs for the Cold Conservation of Marine Products

Available Simplified Semi-empirical Correlation to Predict Hollow Spray Cone Angle for Practical Pressure Swirl Atomizers with Viscous liquid

Effect of geometric and operating parameters on the spray characteristics of an open-end swirl injector

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