April 2016

Slip flow of a second grade fluid past a lubricated rotating disc

Slip flow of a second-grade fluid past a lubricated rotating disc is studied. The disc is lubricated with a power-law fluid. The interfacial conditions between fluid and lubricant are imposed on the surface of disc by assuming a thin lubrication layer. The numerical solutions are obtained using Keller-Box method. The effects of slip parameter and Weissenberg number on the three components of fluid velocity and pressure...

Author(s): K. Mahmood, M. Sajid, N. Ali and T. Javed

April 2016

Purity-performance relationship of anthocyanidins as sensitizer in dye-sensitized solar cells

A comparative analysis between crude and purified extracts obtained from withered leaves of Terminalia catappa (T. catappa) and pure compounds of anthocyanidins as organic sensitizers in solar cells. The chemical and electronic properties of the extracts and the pure anthocyanidins were examined using spectroscopic studies: ultraviolet (UV), Fourier transform infrared (FT-IR) and gas chromatography coupled with flame...

Author(s): Ibrahim Olasegun A., Bello Isah A., Semire Banjo, Bolarinwa Hakeem S. and Boyo Adenike