کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
644458 1368130 2016 10 صفحه PDF سفارش دهید دانلود کنید
عنوان انگلیسی مقاله
Effects of wall conditions on flow field in a circular micro-channel
ترجمه فارسی عنوان
اثر شرایط دیوار بر میدان جریان در یک میکرو کانال دایره ای
کلمات کلیدی
DSMC؛ جریان رقیق؛ میکرو کانال دایره ای . تعامل گاز سطح
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• TMAC rather than NMAC has great influence on the flow field in circular microchannel.
• The flow field is greatly influenced by the velocity stages in vicinity of the wall.
• Effect of wall roughness on flow field is much greater than that of wall material.

Effects of a gas-surface interaction model, the Cercignani-Lampise-Lord model, on primary fluid properties in a circular micro-channel are investigated in this paper. The tangential momentum accommodation coefficient (TMAC) has a significant influence on the flow field in the micro-channel. However, the variation of the flow field with the normal momentum accommodation coefficient is not as significant as that with the TMAC. The fundamental mechanism behind the change of flow field is revealed. Moreover, it is found that the effect of the wall roughness on the flow field is much greater than that of the wall material. When the wall roughness varies, the mass flux of the ring section region between the half radius and the radius changes a lot while the rest remains unchanged. However, the heat flux over the cross section remains almost unchanged with the variation of the wall material when the wall is rough.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Thermal Engineering - Volume 109, Part A, 25 October 2016, Pages 217–226
نویسندگان
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