کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
592617 1453912 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling air–water interface in disordered fibrous media with heterogeneous wettabilities
ترجمه فارسی عنوان
مدلسازی رابط آب در محیط فیبری اختلال با رطوبت ناهمگن
کلمات کلیدی
کاپیتالیسم، رسانه فیبری، زاویه تماس الیاف متفاوت، رطوبت
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• A model for tracking a fluid interface in a bank of parallel dissimilar cylinders.
• Algorithm is based on balance of applied pressure and capillary forces on menisci.
• Instantaneous interface shape and fluid saturation are obtained and reported.
• Algorithm can handle systems with fibers of multiple wettabilities.
• Proposed an equation to expand utility of results beyond the current simulations.

Considering the balance of mechanical forces across a meniscus anchored to two circular objects, we developed a CPU-friendly semi-analytical algorithm for tracking the instantaneous shape and position of the air–water interface inside microstructures that resemble a collection of disordered parallel cylinders, e.g., a bundle of fibers in a fiber-reinforced composite or microfabricated posts in a microfluidic system. In the context of fluid transport in fibrous media, in particular, the methodology presented in this paper provides a means for producing a relationship between capillary pressure and fluid saturation in media with heterogeneous wettabilities – often needed to predict the rate of fluid transport. In addition, we developed a conversion formulation that allows a capillary pressure–saturation relationship obtained for one combination of contact angles to be used to construct such a relationship for media with different combinations of contact angles, eliminating the need for additional simulations.

A novel interface tracking algorithm is presented which determines the location and shape of the fluid interface(s) over varying applied pressures for structures comprised of randomly placed parallel fibers or cylinders. Fibers of different hydrophilicities can exist within the same structure.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 461, 5 November 2014, Pages 323–335
نویسندگان
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