A molecular dynamics simulation investigation of fuel droplet in evolving ambient conditions
Artikel i vetenskaplig tidskrift, 2014
Molecular dynamics simulations are applied to model fuel droplet surrounded by air in a spatially and temporally evolving environment. A numerical procedure is developed to include chemical reactions into molecular dynamics. The model reaction is chosen to allow investigation of the position of chemical reactions (gas phase, surface, liquid phase) and the behavior of typical products (alcohols and aldehydes). A liquid droplet at molecular scale is seen as a network of fuel molecules interacting with oxygen, nitrogen, and products of chemical fuel breakdown. A molecule is evaporating when it loosens from the network and diffuses into the air. Naturally, fuel molecules from the gas phase, oxygen and nitrogen molecules can also be adsorbed in the reverse process into the liquid phase. Thus, in the presented simulations the time and length scales of transport processes - oxygen adsorption, diffusion, and fuel evaporation are directly determined by molecular level processes and not by model constants. In addition, using ab initio calculations it is proven that the reaction barriers in liquid and gas phases are similar. (C) 2013 The Combustion Institute. Published by Elsevier Inc. All rights reserved. RAMZON B, 1989, INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, V32, P1605
TRANSFERABLE
NUMERICAL SIMULATIONS
VAPORIZATION MODEL
REACTION-MECHANISMS
CHEMICAL ENGINEERING SCIENCE12TH INTERNATIONAL SYMP ON CHEMICAL REACTION ENGINEERING : CHEMICAL REACTION ENGINEERING TODAY ( ISCRE 12 )
COMPUTER-SIMULATION
Molecular dynamics
AB-INITIO
1992
P2629
V47
JUN 28-JUL 01
TURIN
Combustion chemistry
NTE M
ITALY
Evaporation
EVAPORATION
POTENTIALS
UNITED-ATOM DESCRIPTION
PHASE-EQUILIBRIA
Spray
HYDROGEN ABSTRACTION REACTIONS
1992
Författare
H. Yanagihara
I. Stankovic
Fredrik Blomgren
Arne Rosen
Göteborgs universitet
I. Sakata
Combustion and Flame
0010-2180 (ISSN)
Vol. 161 2 541-550Ämneskategorier (SSIF 2011)
Kemi
DOI
10.1016/j.combustflame.2013.09.002