Convective rolls and hydrothermal waves in evaporating sessile drops

George Karapetsas; Prashant Valluri; Khellil Sefiane; Omar Matar

Convective rolls and hydrothermal waves in evaporating sessile drops

George Karapetsas, Prashant Valluri, Khellil Sefiane, Omar Matar

School of Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract / Description of output

We examine the dynamics of a sessile droplet sitting on a uniformly heated solid, undergoing evaporation. We use a finite element formulation to solve the axisymmetric time-dependent problem and perform a linear stability analysis taking into account 3D perturbations around this base-state. Our numerical results show that the temperature gradients, which are a natural consequence of the evaporation process, give rise to instabilities including the presence of hydrothermal waves in close agreement with previous experimental observation. We discuss the mechanisms which give rise to these instabilities.

Original language	English
Title of host publication	APS/DFD Fall Meeting, Baltimore, Maryland, USA
Publication status	Published - Nov 2011

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http://meetings.aps.org/link/BAPS.2011.DFD.D20.7

Fluid flow and Mixing: Direct Numerical Simulations Towards Predicting Complex Multiphase Flows - Some Examples
Prashant Valluri (Speaker)
25 Mar 2013
Activity: Academic talk or presentation types › Invited talk

Cite this

@inproceedings{ed6ce7cd2b9c43cd911692fbcf014f9a,

title = "Convective rolls and hydrothermal waves in evaporating sessile drops",

abstract = "We examine the dynamics of a sessile droplet sitting on a uniformly heated solid, undergoing evaporation. We use a finite element formulation to solve the axisymmetric time-dependent problem and perform a linear stability analysis taking into account 3D perturbations around this base-state. Our numerical results show that the temperature gradients, which are a natural consequence of the evaporation process, give rise to instabilities including the presence of hydrothermal waves in close agreement with previous experimental observation. We discuss the mechanisms which give rise to these instabilities.",

author = "George Karapetsas and Prashant Valluri and Khellil Sefiane and Omar Matar",

year = "2011",

month = nov,

language = "English",

booktitle = "APS/DFD Fall Meeting, Baltimore, Maryland, USA",

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TY - GEN

T1 - Convective rolls and hydrothermal waves in evaporating sessile drops

AU - Karapetsas, George

AU - Valluri, Prashant

AU - Sefiane, Khellil

AU - Matar, Omar

PY - 2011/11

Y1 - 2011/11

N2 - We examine the dynamics of a sessile droplet sitting on a uniformly heated solid, undergoing evaporation. We use a finite element formulation to solve the axisymmetric time-dependent problem and perform a linear stability analysis taking into account 3D perturbations around this base-state. Our numerical results show that the temperature gradients, which are a natural consequence of the evaporation process, give rise to instabilities including the presence of hydrothermal waves in close agreement with previous experimental observation. We discuss the mechanisms which give rise to these instabilities.

AB - We examine the dynamics of a sessile droplet sitting on a uniformly heated solid, undergoing evaporation. We use a finite element formulation to solve the axisymmetric time-dependent problem and perform a linear stability analysis taking into account 3D perturbations around this base-state. Our numerical results show that the temperature gradients, which are a natural consequence of the evaporation process, give rise to instabilities including the presence of hydrothermal waves in close agreement with previous experimental observation. We discuss the mechanisms which give rise to these instabilities.

M3 - Conference contribution

BT - APS/DFD Fall Meeting, Baltimore, Maryland, USA

ER -

Convective rolls and hydrothermal waves in evaporating sessile drops

Abstract / Description of output

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Activities

Fluid flow and Mixing: Direct Numerical Simulations Towards Predicting Complex Multiphase Flows - Some Examples

Cite this