Mohamed M M Amin's scientific contributions
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Publications (5)
This study focuses on finding the best design of nozzles used in the water discharge pipelines delivering free jets based on hydraulic considerations. An analytical solution is carried out to determine the best design for these nozzles. The solution depends on the derivative method applied to the energy head concerning the nozzle diameter to maximi...
Minimizing water delivery costs and increasing water supply dependability are the two key objectives in designing and operating of water distribution systems. An analytical solution for
the best pipe diameters of a water distribution pipe network was created in this study. The raw water was collected from a water canal and transported to a treatmen...
![Fig. 3. Cumulative curves for carbonate sand [3].](profile/Medhat-Elzahar-2/publication/369754397/figure/fig2/AS:11431281136654178@1680552773395/Cumulative-curves-for-carbonate-sand-3_Q320.jpg)
Egypt is considered an arid country and depends mainly on the Nile River and groundwater reservoirs to supply water for drinking and various uses. The northwestern coastal zone is one of the regions that rely heavily on groundwater and rainwater for drinking and irrigation. As a result of changes in climate and the rise in sea level, the increase i...
The finite difference method was used in this study to solve the two-dimensional hydrodynamic dispersion equation for a typical coastal unconfined aquifer. A mathematical model is prepared to solve this dispersion problem, which is then modeled and analyzed over time. The salinity profiles for the aquifer transition zone in the Sidi Kirayr locality...
The present study focuses on finding an economic design of nozzles used in water discharge lines. An analytical solution is reached for computing the economic pipe-nozzle diameter ratio achieving the minimum pipe cost using the derivative method. The derived equation shows that at a particular pipe-nozzle diameter ratio, the pipe cost CP is minimum...
Citations
... where D is the inner pipe diameter (m); Q is the gas flow through the pipe in real conditions of pressure and temperature (m 3 /s); note that the Renouard relation, on the contrary, operates with Q st , gas flow at standard conditions; p st is the standard pressure of 10 5 Pa; u is the gas velocity (m/s); here, used for optimisation, u = 15 m/s; p is the real pressure in pipes (Pa); here, p/p st ≈ 4; π is the Ludolpf number ≈ 3.1415. Pipe diameters as part of a gas network with loops are optimised in this article, which is a different problem [88][89][90] compared to determining the diameter of a single pipe (a solution to the problem of a single pipe in particular conditions is given in [91][92][93]103]). In any case, pipes are standardised and therefore they must be chosen from the prescribed list available for sale on the market [94]. ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/11431281185512268-1693659589062_Q64/Medhat-Elzahar-2.jpg)
... Common applications of nozzles in water and wastewater systems can be summarized as follows: Evaporative disposal, such as disposal of excess water/ chemical solution through evaporation, usually over a large pond. Foam control, spray nozzles to break up foam that can cause tank overflow, poor drainage, or other problems (ElZahar et al. 2001, De Cock 2017, Kawser et al. 2020, Amin & ElZahar 2022. Tank mixing, and blending tank contents, homogenize sediment off the tank bottom to aid in transportation and filtration, sweeping solids across the bottom of the tank, and preventing thermal stratification. ...
