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Fluids, Volume 10, Issue 6

2025 June - 21 articles

Cover Story: The steady coupled translation and rotation of a composite spherical particle in a viscous fluid parallel to two plane walls is analyzed by solving the Stokes and Brinkman equations. The hydrodynamic drag force and torque on the composite particle increase with larger values of the ratio of particle radius to surface porous layer permeation length, ratio of hard core radius to particle radius, and separations between particle and walls. The influence of the walls on translation is significantly stronger than that on rotation. When comparing motions parallel versus normal to the walls, the walls impose weaker hydrodynamic force but stronger torque during parallel motions. The coupling between translation and rotation of the composite sphere exhibits complex behavior. View this paper
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Articles (21)

  • Article
  • Open Access
1 Citations
3,452 Views
19 Pages

Evaluation of Flow-Induced Shear in a Porous Microfluidic Slide: CFD Analysis and Experimental Investigation

  • Manoela Neves,
  • Gayathri Aparnasai Reddy,
  • Anitha Niyingenera,
  • Norah Delaney,
  • Wilson S. Meng and
  • Rana Zakerzadeh

17 June 2025

Microfluidic devices offer well-defined physical environments that are suitable for effective cell seeding and in vitro three-dimensional (3D) cell culture experiments. These platforms have been employed to model in vivo conditions for studying mecha...

  • Article
  • Open Access
872 Views
27 Pages

Vertical Dense Jets in Crossflows: A Preliminary Study with Lattice Boltzmann Methods

  • Maria Grazia Giordano,
  • Jérôme Jacob,
  • Piergiorgio Fusco,
  • Sabina Tangaro and
  • Daniela Malcangio

16 June 2025

The dramatic increase in domestic and industrial waste over recent centuries has significantly polluted water bodies, threatening aquatic life and human activities such as drinking, recreation, and commerce. Understanding pollutant dispersion is esse...

  • Article
  • Open Access
2 Citations
1,296 Views
14 Pages

15 June 2025

Computational fluid dynamics (CFD) models have been widely used to evaluate the hydrodynamic and gas exchange performances of oxygenators, which are crucial in supporting patients with lung diseases or failure. However, while CFD models have been eff...

  • Article
  • Open Access
1 Citations
953 Views
19 Pages

Research on the Flow Mechanism of a Large-Scale Wind Turbine Blade Based on Trailing Edge Flaps

  • Yifan Liu,
  • Mingming Zhang,
  • Bingfu Zhang,
  • Haikun Jia,
  • Na Zhao and
  • Zhaohuan Zhang

14 June 2025

This study was performed based on the previous work of this research group to promote the practical engineering application of trailing edge flaps. Specifically, the established “intelligent blade” simulation platform was used for simulat...

  • Article
  • Open Access
1,326 Views
16 Pages

13 June 2025

Lighthill’s theory of sound generation was developed to calculate acoustic radiation from a narrow region of turbulent flow embedded in an infinite homogeneous fluid. The theory is extended to include a simple model of non-isothermal fluid that...

  • Article
  • Open Access
1,357 Views
19 Pages

Ground Clearance Effects on the Aerodynamic Loading of Tilted Flat Plates in Tandem

  • Dimitrios Mathioulakis,
  • Nikolaos Vasilikos,
  • Panagiotis Kapiris and
  • Christina Georgantopoulou

12 June 2025

The aerodynamic loading of four as well as of six tilted flat plates-panels arranged in tandem and in close proximity to the ground is examined through force and pressure measurements. In the four-plate set up, conducted in an open-circuit wind tunne...

  • Article
  • Open Access
2 Citations
1,309 Views
19 Pages

12 June 2025

A semi-analytical investigation is conducted to examine the coupled translational and rotational motions of a composite spherical particle (consisting of an impermeable hard core surrounded by a permeable porous shell) immersed in a viscous fluid par...

  • Article
  • Open Access
1,274 Views
19 Pages

Influence of an Air Slit in Dust Shields on Accumulation of Dust over PV Panels

  • Ahmed M. Gobran,
  • Mohamed S. Abd-Elhady and
  • Hamdy A. Kandil

10 June 2025

Dust accumulation on Photovoltaic (PV) panels represents a major challenge for the operation of panels. There are several passive dust mitigation techniques, such as using a dust shield whose performance has been enhanced by integrating it with an ai...

  • Article
  • Open Access
2,444 Views
25 Pages

9 June 2025

In aerospace, flow control techniques have improved the separation flow characteristics around airfoils by various means. In this paper, the delayed detached eddy simulation (DDES) technique is used to simulate the detailed flow field around the NACA...

  • Article
  • Open Access
1 Citations
1,333 Views
18 Pages

9 June 2025

A generalized model of the variable permeability in the transition layer is introduced in this work. This model can handle flows with a small Darcy number and might be useful in controlling permeability amplifications. A solution method for the resul...

  • Article
  • Open Access
1,736 Views
14 Pages

Ultrasound-Assisted Melt Extrusion of Polymers with the Main Harmonics of 10–60 kHz

  • Diana Agüero-Valdez,
  • Alain González-Sánchez,
  • María Teresa Rodríguez-Hernández,
  • Heidi Andrea Fonseca-Florido,
  • Juan Guillermo Martínez-Colunga,
  • Janett Anaid Valdez-Garza,
  • Gilberto Francisco Hurtado-López,
  • Víctor Javier Cruz-Delgado and
  • Carlos Alberto Ávila-Orta

5 June 2025

Using a digital oscilloscope, the main harmonics resulting from the application of different frequencies and power levels of ultrasonic waves during the polymer extrusion process were identified. The primary harmonics are located between 10 and 60 kH...

  • Article
  • Open Access
1 Citations
1,248 Views
16 Pages

1 June 2025

The principle of electro-analogy analysis treats a gas path structure as analogous to a circuit, offering significant potential for performance analysis in aerostatic systems. However, research on gas resistance remains in an early stage. This study...

  • Review
  • Open Access
17 Citations
9,236 Views
19 Pages

1 June 2025

Biomass fluidized bed gasification technology has attracted significant attention due to its high efficiency and clean energy conversion capabilities. However, its industrial application has been limited by insufficient technological maturity. This p...

  • Article
  • Open Access
2,238 Views
18 Pages

Digital Twins: A Solution Under the Standard k-ε Model in Industrial CFD, to Predict Ideal Conditions in a Sugar Dryer

  • Verónica Guerrero-Hernández,
  • Guillermo Reyes-Morales,
  • Violeta Alejandra Bastián Lima,
  • Jorge Ortega-Moody,
  • Quelbis Román Quintero Bertel,
  • Gerardo Aguila Rodríguez,
  • Blanca Estela González Sánchez,
  • Claudia Ceballos-Díaz and
  • Luis Carlos Sandoval Herazo

1 June 2025

Currently, emerging technologies such as digital twins, through the application of frontier techniques, have achieved physics-based simulations that reduce time and costs. Hence, its application is of the utmost importance in the industry, mainly in...

  • Article
  • Open Access
1 Citations
2,021 Views
18 Pages

31 May 2025

Curved surfaces are a feature of many engineering applications, and as such, the accurate prediction of separation and reattachment from a curved surface is of great engineering importance. In this study, improved delayed detached eddy simulation (ID...

  • Article
  • Open Access
1 Citations
1,178 Views
13 Pages

28 May 2025

Superhydrophobic surfaces with a low liquid–solid contact time have huge application prospects in anti-icing, corrosion-resistant, self-cleaning, etc. Significant attempts have been devoted to reducing the contact time through altering the hydr...

  • Article
  • Open Access
1 Citations
1,421 Views
22 Pages

28 May 2025

This study investigates the organized flow structures and turbulence quantities in a transitional oscillatory boundary-layer flow over a smooth bed using a DNS model set up by the open-source framework Nektar++ (v5.2.0). The present model was validat...

  • Article
  • Open Access
3 Citations
1,327 Views
18 Pages

27 May 2025

Computational fluid dynamics (CFD) can be used to analyze the airflow patterns within a naturally ventilated cattle barn in detail, taking into account the influence of the animals. Typically, animals are modelled either as solid obstacles or as a po...

  • Article
  • Open Access
2 Citations
2,872 Views
29 Pages

27 May 2025

In this work, a novel type of shell and helically coiled heat exchangers (SHCHEXs) that are used extensively in numerous applications has been numerically and experimentally studied. A low-cost and easily applicable design for enhancing the heat exch...

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Fluids - ISSN 2311-5521