Large-Eddy Simulation of Multi-Fluid Flows in Combustion Systems

• Research unit: COST
• Project number: C06.0101

Key words (English)

LES; Spray; CFD; Combustion

Research programs (English)

COST-Action P20 - LES-AID Large-Eddy Simulation for Advanced Industrial Design

Short description (English)

This project aims at coupling Interface-tracking (ITM) and Lagrangian Particle-Tracking (LPT) techniques as the core com-putational strategy for the LES of interfacial and dispersed multi-phase flows. The model will be applied for sprays in com-bustion systems.

Partners and International Organizations (English)

BE, CH, CY, CZ, DE, DK, ES, FR, GR, HU, IT, MK, NL, PL, SE, UK

Abstract (English)

This project aims at coupling Interface Tracking Methods (ITM's) and Lagrangian Particle-Tracking (LPT) techniques to build the core computational strategy for the LES of reactive and non-reactive multi-phase flows. The model will be applied for the design of spray atomization in combustion systems and various other thermal-hydraulics settings. The high order Volume-of-Fluid (VOF) ITM method will constitute the basis for the ITM approach to deal with supergrid interfacial scales, while the LPT will be active to predict under-resolved, interfacial sub-grid scales to which we refer to here as (I-SGS). In other words, when sprays are formed subsequently to jet fragmentation the VOF method cannot track the thousands of spray elements having a size smaller than the grid (sub-grid); the Lagrangian point-particle approach will take over to track these sub-scales using the point particle method. This coupling part constitutes the core of Work-Package 1. In terms of turbulence, the same thinking applies, in that the super-grid resolved turbulence structures will be directly solved while the sub-scale ones to which we refer to here as (T-SGS) will be modeled. Besides the Coupling issue treated in WP-1, the Closure for under-resolved scales (I-SGS and T-SGS) constitutes the second part of this project. This part of the project should aim at developing the suitable SGS models for reactive and multiphase flows, which consider in particular the interaction between turbulence and interfacial sub-scales. This is the core of Work-Package 2. Incorporating phase-change and chemical reaction modeling into the code will form Work-Package 3 of this project.

References in databases (English)

Swiss Database: COST-DB of the State Secretariat for Education and Research Hallwylstrasse 4 CH-3003 Berne, Switzerland Tel. [phone] Swiss Project-Number: C06.0101