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Energies
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Development of Numerical Simulations for Synthetic Jet Flows
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Development of Numerical Simulations for Synthetic Jet Flows

A special issue of Energies (ISSN 1996-1073).

Deadline for manuscript submissions: closed (31 October 2020) | Viewed by 3058

Special Issue Editors

Prof. Dr. Luigi De Luca

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Naples Federico II, 80125 Napoli NA, Italy
Interests: thermo-fluid dynamic stability; flow control; synthetic jet actuators; free surface flows
Special Issues, Collections and Topics in MDPI journals
Dr. Matteo Chiatto

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Naples Federico II, 80125 Napoli NA, Italy
Interests: modal decomposition; reduced-order models; flow control; synthetic jet actuators; gasdynamics; thermo-fluid dynamic stability
Special Issues, Collections and Topics in MDPI journals
Dr. Andrea Palumbo

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Naples Federico II, 80125 Napoli NA, Italy
Interests: fluid flow control, fluid dynamic stability, development and application of synthetic jets, computational fluid dynamics (CFD)

Special Issue Information

Dear Colleagues,

A class of modern active control actuators is clustered under the common term Synthetic Jet (SJ), meaning that the jet is synthetized within the fluid to be controlled without the use of any traditional pumping device. Piezo-driven and Plasma (i.e., Spark and Dielectric Barrier Discharge (DBD)) actuators are currently the object of theoretical, numerical and experimental investigations.  The recent literature provided a huge amount of contributions related to the basic characterization of such devices, whilst the current ongoing research is devoted to various applications for the flow control, addressing specific needs and issues. The aim of the present special issue is to collect original papers concerned with the numerical simulation of the flow fields of various types of SJ actuators for the flow control, without any limitation to the specific application field. Contributions regarding jets in quiescent ambient, as well as interaction of jets with the current to be controlled are welcome, provided they deal with the interaction between the jet and the external fluid current to be controlled.

Prof. Dr. Luigi De Luca
Dr. Matteo Chiatto 
Dr. Andrea Palumbo
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Flow control
  • Synthetic jet actuator
  • Flow separation
  • Turbulence
  • Heat transfer
  • Mixing flow
  • Atomization
  • Low Order Modeling (LOM) Global Stability

Published Papers (1 paper)

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Research

22 pages, 7460 KiB  
Article
Towards Accurate Boundary Conditions for CFD Models of Synthetic Jets in Quiescent Flow
by Andrea Matiz-Chicacausa and Omar D. Lopez Mejia
Energies 2020, 13(24), 6514; https://doi.org/10.3390/en13246514 - 10 Dec 2020
Cited by 2 | Viewed by 2471
Abstract
In this paper, an accurate model to simulate the dynamics of the flow of synthetic jets (SJ) in quiescent flow is proposed. Computational modeling is an effective approach to understand the physics involved in these devices, commonly used in active flow control for [...] Read more.
In this paper, an accurate model to simulate the dynamics of the flow of synthetic jets (SJ) in quiescent flow is proposed. Computational modeling is an effective approach to understand the physics involved in these devices, commonly used in active flow control for several reasons. For example, SJ actuators are small; hence, it is difficult to experimentally measure pressure changes within the cavity. Although computational modeling is an advantageous approach, experiments are still the main technique employed in the study of SJs due to the lack of accurate computational models. The same aspect that represents an advantage over other techniques also represents a challenge for the computational simulations, such as capturing the unsteady phenomena, localized compressible effects, and boundary layer formation characteristic of this complex flow. One of the main challenges in the simulation of SJs is related to the fact that the spatial and temporal scales of the actuator and the corresponding flow control application differed in several orders of magnitude. Hence, in this study we focus on the use of Computational Fluid Dynamics (CFD) and Reduced Order Models (ROM) to develop an accurate yet low-cost model to capture the complexities of the flow of a SJ in quiescent flow. Numerical results show two possible paths for SJ modeling; (1) to obtain a boundary condition to predict velocity profile and jet formation from experimental data of diaphragm’s deformation; and, (2) to predict peak velocity at the jet’s outlet with a ROM approach and to use the physical details of the actuator to develop an accurate boundary condition for CFD. Both approaches are validated through experimental data available in the literature; good agreement between results from CFD, Lumped Element Model (LEM), and experimental data are achieved. Finally, it was concluded that the coupling between LEM and CFD is a novel and accurate approach, which improves CFD due to the advantages of LEM closing the gap between LEM’s lack of flow detail and CFD’s lack of geometrical/physical information of the actuator. Full article
(This article belongs to the Special Issue Development of Numerical Simulations for Synthetic Jet Flows)
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