Hybrid quasi molecular-continuum modeling of supercooled large droplet dynamics for in-flight icing conditions

V. Abdollahi, W. G. Habashi, M. Fossati

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

1 Citation (Scopus)

Abstract

A mesoscale model for droplet dynamics based on a quasi-molecular approach is proposed. It considers the interaction between quasi-molecules within a single liquid droplet, each quasi-molecule representing an agglomeration of a large number of actual water molecules. The goal is to improve the understanding of the dynamics of large droplets collisions over dry or wet surfaces at velocities typical of aeronautical applications. This detailed analysis will eventually be used to refine the macroscopic Eulerian description of the water impingement process by providing numerical correlations for splashing and bouncing phenomena. Approaches for extracting macroscopic quantities such as temperature and transport coefficients from the quasi-molecular method are discussed. A proper choice of the free parameter of the model that leads to accurate values of the macroscopic properties is also addressed. To model the droplet impingement process more accurately, the quasimolecular approach is then coupled with a continuum flow solver in order to include the droplet deformation effects due to the external airflow.

LanguageEnglish
Title of host publication54th AIAA Aerospace Sciences Meeting
Publication statusPublished - 8 Jan 2016
Externally publishedYes
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: 4 Jan 20168 Jan 2016

Conference

Conference54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period4/01/168/01/16

Fingerprint

Molecules
Water
Agglomeration
Liquids
Temperature

Keywords

  • supercooled large droplets
  • droplet dynamics

Cite this

@inproceedings{9e3d3127caca458cb7fe9194cd61d364,
title = "Hybrid quasi molecular-continuum modeling of supercooled large droplet dynamics for in-flight icing conditions",
abstract = "A mesoscale model for droplet dynamics based on a quasi-molecular approach is proposed. It considers the interaction between quasi-molecules within a single liquid droplet, each quasi-molecule representing an agglomeration of a large number of actual water molecules. The goal is to improve the understanding of the dynamics of large droplets collisions over dry or wet surfaces at velocities typical of aeronautical applications. This detailed analysis will eventually be used to refine the macroscopic Eulerian description of the water impingement process by providing numerical correlations for splashing and bouncing phenomena. Approaches for extracting macroscopic quantities such as temperature and transport coefficients from the quasi-molecular method are discussed. A proper choice of the free parameter of the model that leads to accurate values of the macroscopic properties is also addressed. To model the droplet impingement process more accurately, the quasimolecular approach is then coupled with a continuum flow solver in order to include the droplet deformation effects due to the external airflow.",
keywords = "supercooled large droplets, droplet dynamics",
author = "V. Abdollahi and Habashi, {W. G.} and M. Fossati",
year = "2016",
month = "1",
day = "8",
language = "English",
isbn = "9781624103933",
booktitle = "54th AIAA Aerospace Sciences Meeting",

}

Abdollahi, V, Habashi, WG & Fossati, M 2016, Hybrid quasi molecular-continuum modeling of supercooled large droplet dynamics for in-flight icing conditions. in 54th AIAA Aerospace Sciences Meeting. 54th AIAA Aerospace Sciences Meeting, 2016, San Diego, United States, 4/01/16.

Hybrid quasi molecular-continuum modeling of supercooled large droplet dynamics for in-flight icing conditions. / Abdollahi, V.; Habashi, W. G.; Fossati, M.

54th AIAA Aerospace Sciences Meeting. 2016.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

TY - GEN

T1 - Hybrid quasi molecular-continuum modeling of supercooled large droplet dynamics for in-flight icing conditions

AU - Abdollahi, V.

AU - Habashi, W. G.

AU - Fossati, M.

PY - 2016/1/8

Y1 - 2016/1/8

N2 - A mesoscale model for droplet dynamics based on a quasi-molecular approach is proposed. It considers the interaction between quasi-molecules within a single liquid droplet, each quasi-molecule representing an agglomeration of a large number of actual water molecules. The goal is to improve the understanding of the dynamics of large droplets collisions over dry or wet surfaces at velocities typical of aeronautical applications. This detailed analysis will eventually be used to refine the macroscopic Eulerian description of the water impingement process by providing numerical correlations for splashing and bouncing phenomena. Approaches for extracting macroscopic quantities such as temperature and transport coefficients from the quasi-molecular method are discussed. A proper choice of the free parameter of the model that leads to accurate values of the macroscopic properties is also addressed. To model the droplet impingement process more accurately, the quasimolecular approach is then coupled with a continuum flow solver in order to include the droplet deformation effects due to the external airflow.

AB - A mesoscale model for droplet dynamics based on a quasi-molecular approach is proposed. It considers the interaction between quasi-molecules within a single liquid droplet, each quasi-molecule representing an agglomeration of a large number of actual water molecules. The goal is to improve the understanding of the dynamics of large droplets collisions over dry or wet surfaces at velocities typical of aeronautical applications. This detailed analysis will eventually be used to refine the macroscopic Eulerian description of the water impingement process by providing numerical correlations for splashing and bouncing phenomena. Approaches for extracting macroscopic quantities such as temperature and transport coefficients from the quasi-molecular method are discussed. A proper choice of the free parameter of the model that leads to accurate values of the macroscopic properties is also addressed. To model the droplet impingement process more accurately, the quasimolecular approach is then coupled with a continuum flow solver in order to include the droplet deformation effects due to the external airflow.

KW - supercooled large droplets

KW - droplet dynamics

UR - http://www.scopus.com/inward/record.url?scp=85007560435&partnerID=8YFLogxK

M3 - Conference contribution book

SN - 9781624103933

BT - 54th AIAA Aerospace Sciences Meeting

ER -