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Fluids, Volume 9, Issue 11

November 2024 - 25 articles

Cover Story: This work assesses the validity of established semi-empirical correlations for natural convection heat sink design for a wide range of flow and operating conditions, with the upper limits of the Grashof number and Elenbaas number being 1.6 × 10¹¹ and 3.4 × 10⁷, respectively. Different computational fluid dynamics (CFD) models (e.g., laminar, transition-SST, k-ω SST, and k-ϵ) were evaluated. Two-dimensional CFD simulations can accurately predict laminar conditions, but only quasi-3D CFD simulations accurately capture turbulent conditions. The γ-Re_θ transition SST model performed best in those conditions. A new non-dimensional group was introduced for regime identification based on the Elenbaas number. Future work will consider large eddy simulation (LES) to better understand the influence of turbulent flow conditions occurring in real-world natural convection cooling applications. View this paper

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Review

3 Citations

2,520 Views

86 Pages

A Nonlinear Approach in the Quantification of Numerical Uncertainty by High-Order Methods for Compressible Turbulence with Shocks

H. C. Yee,
P. K. Sweby,
Björn Sjögreen and
D. V. Kotov

Fluids2024, 9(11), 250;https://doi.org/10.3390/fluids9110250

25 October 2024

This is a comprehensive overview on our research work to link interdisciplinary modeling and simulation techniques to improve the predictability and reliability simulations (PARs) of compressible turbulence with shock waves for general audiences who...

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Article

1,086 Views

18 Pages

On the Use of Different Sets of Variables for Solving Unsteady Inviscid Flows with an Implicit Discontinuous Galerkin Method

Luca Alberti,
Emanuele Cammalleri,
Emanuele Carnevali and
Alessandra Nigro

Fluids2024, 9(11), 248;https://doi.org/10.3390/fluids9110248

25 October 2024

This article presents a comparison between the performance obtained by using a spatial discretization of the Euler equations based on a high-order discontinuous Galerkin (dG) method and different sets of variables. The sets of variables investigated...

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Article

4 Citations

2,676 Views

18 Pages

Prediction of Scour Depth for Diverse Pier Shapes Utilizing Two-Dimensional Hydraulic Engineering Center’s River Analysis System Sediment Model

Muhanad Al-Jubouri,
Richard P. Ray and
Ethar H. Abbas

Fluids2024, 9(11), 247;https://doi.org/10.3390/fluids9110247

25 October 2024

Examining scouring around bridge piers is crucial for ensuring water-related infrastructure’s long-term safety and stability. Accurate forecasting models are essential for addressing scour, especially in complex water systems where traditional...

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Article

5 Citations

2,179 Views

18 Pages

Improved Delayed Detached-Eddy Simulation of Turbulent Vortex Shedding in Inert Flow over a Triangular Bluff Body

Matthew R. McConnell,
Jason Knight and
James M. Buick

Fluids2024, 9(11), 246;https://doi.org/10.3390/fluids9110246

24 October 2024

The Improved Delayed Detached-Eddy Simulation (IDDES) is a modification of the original Detached-Eddy Simulation (DES) design to incorporate Wall Modeled Large Eddy Simulation (WMLES) capabilities and to extend the class of flows suitable for this me...

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Article

1 Citations

2,614 Views

28 Pages

Effects of Channelling a Peripherally Inserted Central Venous Catheter on Blood Flow

Laura Hernández-Cabré,
Marta Ulldemolins-Rams,
Judit Vilanova-Corsellas and
Carles Torras

Fluids2024, 9(11), 245;https://doi.org/10.3390/fluids9110245

22 October 2024

A catheter is a device that is inserted into the venous system to infuse treatment with controlled doses per unit of time. The study of its interaction with blood flow cannot be easily analysed with common analytical methods or different visualizatio...

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