کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7055325 1458039 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Drying of a tape-cast layer: Numerical modelling of the evaporation process in a graded/layered material
ترجمه فارسی عنوان
خشک کردن یک لایه نوار کاست: مدل سازی عددی فرآیند تبخیر در مواد درجه بندی شده / لایه ای
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
Evaporation of water from a ceramic layer is a key phenomenon in the drying process for the manufacturing of water-based tape cast ceramics. In this paper we present a coupled free-flow-porous-media model on the Representative Elementary Volume (REV) scale for coupling non-isothermal multi-phase compositional porous-media flow - for the ceramic layer - and single-phase compositional laminar free flow - for the air above it. The preliminary results show the typical expected evaporation behaviour from a porous medium initially saturated with water, and water-vapour transport to the free-flow region in accordance with the available results from the literature. We elaborate on and discuss the characteristic drying-rate curve for a single layer ceramic, and compare it with that of a graded/layered ceramic. We, moreover, show the influence of the mean diameter of particles of the porous medium (dp) - which directly affects the intrinsic permeability (K) based on the well-known Ergun's equation - of each single ceramic layer on the drying behaviour of a graded/layered ceramic.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 103, December 2016, Pages 1144-1154
نویسندگان
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