On the Performance of Different Empirical Loss Equations for Flow Through Coarse Porous Media (RESEARCH NOTE)
- سال انتشار: 1381
- محل انتشار: ماهنامه بین المللی مهندسی، دوره: 15، شماره: 8
- کد COI اختصاصی: JR_IJE-15-8_006
- زبان مقاله: انگلیسی
- تعداد مشاهده: 182
نویسندگان
Civil Engineering, Ferdowsi University of Mashhad
چکیده
In this paper, the empirical equations that estimate hydraulic parameters for non-linear flow through coarse porous media are evaluated using a series of independent data collected in the laboratory. In this regard, three different relatively uniform soils ranging in size from ۸.۵ to ۲۷.۶ mm have been selected and three random samples drawn from each material. The physical characteristics such as size distribution, porosity, and shape factor have been measured for the ۹ samples. In total, ۹ permeameter tests have been conducted on the samples to create a set of reliable hydraulic gradientvs. bulk velocity data. Statistical measures have been used to compare the permeameter data with those predicted by the empirical equations. The study shows that McCorquodale et al. and Stephenson equations, which some subjective parameters related to the surface characters of the material, have been incorporated in their structures, can give good results. Also, equation developed by Adel who considers d۱۵ as characteristic size of the media, shows acceptable performance. Other equations either underestimate or overestimate hydraulic gradient based on experimental work and analysis conducted in this study.کلیدواژه ها
Rockfill, Coarse Porous Media, Non, linear Flow, Darcy Flow, Forchheimer equation, Missbach Equationاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.