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Some engineering and thermal properties of black cumin (Nigella sativa L.) seeds
Author(s) -
AlMahasneh Majdi A.,
Ababneh Hussein A.,
Rababah Taha
Publication year - 2008
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/j.1365-2621.2007.01561.x
Subject(s) - angle of repose , sphericity , bulk density , materials science , thermal conductivity , composite material , roundness (object) , biology , ecology , soil water
Summary Engineering and thermal properties of black cumin seeds at 5.3% (w.b.) moisture content were obtained. Seed length, width and thickness ranged from 2.85 to 3.27 mm, 1.36 to 1.81 mm and 0.84 to 1.22 mm, respectively. Geometric mean diameter, effective mean diameter, sphericity and roundness ranged from 1.55 to 1.88 mm, 1.63 to 1.77 mm, 51.6 to 60.7% and 66.0 to 71.4%, respectively. One hundred seed mass, true density, bulk density and porosity ranged from 2.35 to 2.85 g, 992 to 1094.1 kg m −3 , 538.4 to 568.4 kg m −3 and 46.6 to 48.1%, respectively. Average static friction coefficient on mild steel, stainless steel, galvanised steel, aluminum and plywood were 0.36, 0.22, 0.39, 0.33 and 0.52, respectively. Angle of repose and terminal velocity ranged from 32.2 to 34.7°, and from 5.4 to 5.9 m s −1 . Specific heat and thermal conductivity varied from 1672 to 2091 J kg −1 K., 0.16 to 0.21 W m −1 K., respectively.