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Lattice Boltzmann Simulation of Droplet Behaviors on Solid Surfaces With Various Wettability Properties Under Steam Shearing Effect
Pages: 820-824
Year: Issue:  4
Journal: Journal of Engineering Thermophysics

Keyword:  steam shearingdroplet deformationdroplet motionlattice Boltzmann simulation;
Abstract: Droplet could be swept by steam flow during dropwise condensation.Droplet morphology could be deformed and could move on the solid surface overcoming the adhesion work of solid under the steam shearing effect.Steam condensation heat transfer performance becomes high when the steam velocity increases.However,the detailed information of the droplet deformation and motion under steam shearing effect has not been clear.The influence mechanism of steam velocity on droplet deformation and motion has not been completed.Therefore,in this paper,droplet deformation and motion on solid surface with various wettability properties under different steam velocities applying free energy lattice Boltzmann method.The influence mechanism of steam velocity and contact angle on droplet deformation and motion is analyzed.Indicating that droplet deformation and motion velocity increase with the increase of steam velocity and contact angle.The residence time of droplet is shortened and the surface renewal frequency is ascended.As a result,the physical mechanism of steam velocity on dropwise condensation heat transfer is displayed qualitatively and semi-quantitatively.
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