کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
594577 1453986 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A computational fluid dynamics model using the volume of fluid method for describing the dynamics of spreading of Newtonian fluids
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
A computational fluid dynamics model using the volume of fluid method for describing the dynamics of spreading of Newtonian fluids
چکیده انگلیسی

A numerical study is performed to describe the dynamics of drop spreading of glycerol–water mixtures with and without surfactant on hydrophilic glass surfaces. A computational fluid dynamics model (CFD), based on the volume of fluid technique (VOF), with piecewise linear interface calculations method (PLIC) for interface reconstruction, is applied to simulate the time evolution of spreading drops on solid surfaces (drop base radius and contact angle). Surface tension and wall adhesion phenomenon are included in the computational model. Numerical simulations with two-dimensional domains are sufficient to reproduce the key qualitative features observed in the experiments. The CFD simulations are quantitatively compared with previously published experimental results. The influence of different factors, such as viscosity, drop volume and non-ionic alkyl (8–16) glucoside (Plantacare 2000) surfactant concentration on the temporal evolution of the drop base radius is systematically investigated. More than 25 simulations have been performed in order to obtain detailed quantitative comparison and clear trends. We have shown, using several independent experiments, that the calculated results compare very well with experimental data for a large range of viscosity (0.02–1.15 Pa s), drop volume (8–60 μL) and in the presence of surfactant. The accuracy of the model demonstrates that the influence of the physical–chemical properties of the liquid such as viscosity, volume and surface tension can be successfully simulated.

A numerical study is performed to describe the dynamics of drop spreading of glycerol–water–surfactant mixtures on glass surfaces. The influence of the viscosity, drop volume and surfactant concentration on the experimental and calculated temporal evolution of the drop base radius is investigated.Figure optionsDownload as PowerPoint slideHighlights
► Dynamics of drop spreading is described by a computational fluid dynamics model.
► The calculated results compare very well with experimental data.
► Good agreement for large range of viscosity 0.02–1.1 Pa s and drop volume 8–60 μL
► The model is still valid in the presence of surfactant.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 386, Issues 1–3, 5 August 2011, Pages 107–115
نویسندگان
, , ,