Hybrid Turbulence Modelling for Engineering Applications

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 6450

Special Issue Editors

Enterprise Engineering Department, Univeristy of Rome “Tor Vergata”, Rome, Italy
Interests: computational fluid dynamics; turbulence modeling; internal combustion engines; energy systems

Special Issue Information

Dear Colleagues,

Engineering turbulent flows typically exhibit an extremely wide range of physical length and time scales, to the point that their Direct Numerical Simulation (DNS) is, and will remain in the foreseeable future, simply unfeasible on standard computing facilities. Therefore, the numerical simulation of this class of fluid flow problems requires a suitable modelling assumption. This may generally belong either to the Reynolds Averaged Navier-Stokes (RANS) or Large Eddy Simulation (LES) families. The RANS approach does not allow one to reproduce all or most of the relevant physical scales, since it is based on a statistical description of turbulence. As such, it is used when a reasonable prediction of the mean flow parameters is the only desired outcome. In contrast, the LES principle is designed to solve a large portion of the intrinsically unsteady turbulent flow scales, introducing some modelling criterion only for the smaller ones. Although less intensive compared to DNS, the computational requirements of a standard LES may still be (and often are) excessive for engineering applications, due to the very high Reynolds numbers involved and/or to the topological complexity of the considered flow configurations. In an attempt to overcome the deficiencies of both approaches, while retaining at the same time their favorable features, a number of hybrid or merged strategies have been established since the late ‘90s of the past century. 

Some of the most popular hybrid techniques include the Detached Eddy Simulation (DES) method and its derivatives, the Very Large Eddy Simulation (VLES) approach, and the Scale-Adaptive Simulation (SAS) principle. The general philosophy behind hybrid approaches is based on a local resolution evaluation: if the numerical resolution and accuracy is sufficient, then the flow is resolved in LES mode; otherwise, the best Unsteady-RANS (URANS) model available for the specific application is enabled. 

Despite the fact that hybrid techniques have already reached remarkable robustness and maturity in certain branches (e.g., aerospace, turbomachinery, and low-Mach number aerodynamics), they still require significant development efforts to address several issues and “gray areas”, especially in specific research fields such as internal combustion engines, multiphase flows, etc. 

As Guest Editors of the Special Issue entitled “Hybrid Turbulence Modelling for Engineering Applications”, we warmly invite you to submit your work in this area for consideration for publication. This Special Issue aims at collecting selected highly relevant contributions, including either original research articles or comprehensive reviews, in order to provide a snapshot of the state of the art and a preview of future perspectives in the field of hybrid turbulence modelling for engineering applications.

Dr. Giovanni Di Ilio
Dr. Vesselin Krassimirov Krastev
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. Applied Sciences 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 2400 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

  • CFD
  • Turbulence modeling
  • Hybrid URANS/LES
  • Detached Eddy Simulation
  • Scale-Adaptive Simulation
  • Very Large Eddy Simulation
  • Aerodynamics
  • Internal combustion engines
  • Fuel spray

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

15 pages, 9225 KiB  
Article
An Overview of Hybrid RANS–LES Models Developed for Industrial CFD
by Florian Menter, Andreas Hüppe, Alexey Matyushenko and Dmitry Kolmogorov
Appl. Sci. 2021, 11(6), 2459; https://doi.org/10.3390/app11062459 - 10 Mar 2021
Cited by 46 | Viewed by 5977
Abstract
An overview of scale-resolving simulation (SRS) methods used in ANSYS Computational Fluid Dynamics (CFD) software is provided. The main challenges, especially when computing boundary layers in large eddy simulation (LES) mode, will be discussed. The different strategies for handling wall-bound flows using combinations [...] Read more.
An overview of scale-resolving simulation (SRS) methods used in ANSYS Computational Fluid Dynamics (CFD) software is provided. The main challenges, especially when computing boundary layers in large eddy simulation (LES) mode, will be discussed. The different strategies for handling wall-bound flows using combinations of RANS and LES models will be explained, along with some specific application examples. It will be demonstrated that the stress-blended eddy simulation (SBES) approach is optimal for applications with a mix of boundary layers and free shear flows due to its low cost and its ability to handle boundary layers in both RANS and wall-modeled LES (WMLES) modes. Full article
(This article belongs to the Special Issue Hybrid Turbulence Modelling for Engineering Applications)
Show Figures

Figure 1

Back to TopTop