Mohamed F. Al-Dawody

Bio: Mohamed F. Al-Dawody is an academic researcher from University of Alabama. The author has contributed to research in topics: Diesel engine & Diesel fuel. The author has an hindex of 5, co-authored 19 publications receiving 158 citations. Previous affiliations of Mohamed F. Al-Dawody include Andhra University.

Experimental and simulation study for the effect of waste cooking oil methyl ester blended with diesel fuel on the performance and emissions of diesel engine

Abstract: The methyl ester of waste cooking oil (MEWCO) has been prepared from used cooking oils collected from different restaurants and investigated experimentally and theoretically. The suggested biodiesel is mixed with different percentages (10%, 20%and 100%) on a volume basis together with original diesel fuel and tested on a constant speed diesel engine. The experimental work deals with the impact of the blending ratio on the performance and emission parameters at different load conditions. The experimental side is verified with simulation study done by Diesel-rk software and it reveals that they are in good agreement. The maximum pressure reduced as a result of increasing MEWCO blends due to the reduction in the heating value of the blended fuels. Both sides are reported promising reduction in nitrogen oxides (NOx) on the behalf of carbon emissions. Mixing 20% MEWCO is the best compromise, mixing ratio and beyond that, dramatic reduction in the outcome of the performance has been observed.

Numerical investigation of natural convection on Al 2 O 3 -water porous enclosure partially heated with two fins attached to its hot wall: under the MHD effects

Abstract: Numerical investigation for the steady-state laminar nanofluid 2D natural convection in a partially heated porous cavity equipped with two fins at the hot wall under the effect of a uniform magnetic field is carried out. Effects of wide ranges of variables including: Hartman number (0−80), direction of the magnetic field (0o−90°), Rayleigh number (103−106), Darcy number (10–2−10–5), nano-solid particles volume fraction (ϕ = 0% and 6%), length of the attached hot fins (0.25, 0.5, and 0.75) and the length of the partially heated (0.25, 0.5, and 0.6) wall are analyzed. The study results show that by increasing the Hartman number, the average Nusselt number will decrease. Moreover, by increasing the nano-solid particle volume fraction, Rayleigh number, Darcy number, the length of the hot fins, and the partially heated wall, a better heat transfer rate is achieved; consequently, the average Nusselt number will increase. Results show no consistent trend for the effect of the magnetic field direction on the average Nusselt number. The results show an enhancement in the average Nusselt number by 22.46% in the case of b = 0.6 and ϕ = 0.06 compared to the base case of b = 0.25 and ϕ = 0.06.

The Design and Analysis of Experiments

Abstract: THE DESIGN AND ANALYSIS OF EXPERIMENTS. By Oscar Kempthorne. New York, John Wiley and Sons, Inc., 1952. 631 pp. $8.50. This book by a teacher of statistics (as well as a consultant for \"experimenters\") is a comprehensive study of the philosophical background for the statistical design of experiment. It is necessary to have some facility with algebraic notation and manipulation to be able to use the volume intelligently. The problems are presented from the theoretical point of view, without such practical examples as would be helpful for those not acquainted with mathematics. The mathematical justification for the techniques is given. As a somewhat advanced treatment of the design and analysis of experiments, this volume will be interesting and helpful for many who approach statistics theoretically as well as practically. With emphasis on the \"why,\" and with description given broadly, the author relates the subject matter to the general theory of statistics and to the general problem of experimental inference. MARGARET J. ROBERTSON