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Invention of nanofluid has proved revolutionary in the enhancement of fluid thermal and electrical conductivity. Industrial applications of gold–water nanofluids over rotating surface include, but not limited to, heat transfer fluids, as a solar absorber, in medieval medicine for the diagnosis of syphilis, and so forth. Gold–water nanofluid is useful in colorant of glass and silk, nonlinear optics,...
Coronavirus pandemic (COVID‐19) hit the world in December 2019, and only less than 5% of the 15 million cases were recorded in Africa. A major call for concern was the significant rise from 2% in May 2020 to 4.67% by the end of July 15, 2020. This drastic increase calls for quick intervention in the transmission and control strategy of COVID‐19 in Africa. A mathematical model to theoretically investigate...
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