| Title: |
DNS simulation and analysis of periodic planar liquid sheet assisted atomization |
| Authors: |
Averseng, Matthias; Zuzio, Davide; Boutsikakis, Athanasios; Estivalèzes, Jean-Luc |
| Contributors: |
DMPE, ONERA, Université de Toulouse Toulouse; ONERA-Communauté d'universités et établissements de Toulouse (Comue de Toulouse); Institut de mécanique des fluides de Toulouse (IMFT); Université Toulouse III - Paul Sabatier (UT3); Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Communauté d'universités et établissements de Toulouse (Comue de Toulouse)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP); Communauté d'universités et établissements de Toulouse (Comue de Toulouse) |
| Source: |
10th International Conference on Multiphase Flow (ICMF 2019); https://hal.science/hal-02195162; 10th International Conference on Multiphase Flow (ICMF 2019), May 2019, Rio de Janeiro, Brazil; http://www.icmf2019.com.br/ |
| Publisher Information: |
CCSD |
| Publication Year: |
2019 |
| Collection: |
Université Toulouse III - Paul Sabatier: HAL-UPS |
| Subject Terms: |
SURFACE DENSITY; LIQUID SHEET; DNS SIMULATION; AIR-BLASTED ATOMIZATION; DENSITE D'INTERFACE; NAPPE LIQUIDE; SIMULATION DNS; ATOMISATION ASSISTEE; [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph] |
| Subject Geographic: |
Rio de Janeiro; Brazil |
| Description: |
International audience ; Air-blasted atomization is the result of shearing instabilities triggered by the interactions between the liquid and gas flows. Many recent works have performed accurate Direct Numerical Simulation of liquid sheet disintegration. Indeed, high resolution DNSs are able to reproduce the smallest scales of atomization. Unfortunately this numerical accuracy is too expensive for industrial or parametric studies. LES is becoming on the other hand an efficient tool for simulating complex unsteady flows. However, in the case of assisted atomization no modelling is yet available for taking into account the sub-grid interfacial topological changes. A promising approach consists in building a transport equation for the sub-grid surface density, similar to the classical turbulence sub-grid quantities. In this approach, a source term takes in account the increase of the total liquid surface induced by the assisted atomization process. A definitive closure of this term is however not universally acknowledged. The objective of the present work is to contribute to the understanding and the modelling of the sub-grid surface source term. Several DNSs of a periodical planar liquid sheet atomization are presented, in which the total liquid surface evolution is measured in time. The influence of several inflow parameters, as density and velocity ratio, as well as initial boundary layer thickness, is evaluated on this quantity. Results show how surface growth rates as well as caracteristic times can be effectively measured in this kind of simulation. |
| Document Type: |
conference object |
| Language: |
English |
| Availability: |
https://hal.science/hal-02195162; https://hal.science/hal-02195162v1/document; https://hal.science/hal-02195162v1/file/DMPE19072.1561041764.pdf |
| Rights: |
info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.CE87146F |
| Database: |
BASE |