Centrifugal pumps are being widely used in various industries for moving fluids that carry solids through pipelines where the need of head and flow rate is not high. Slurry erosion and cavitation are an extremely complex and not yet fully understood phenomenon that occur in centrifugal pumps; however, these undesirable phenomena can be reduced to a certain extent. Appropriate design and development of experiments is required to reasonably predict slurry erosion and cavitation. However, CFD methodology complements analytical solutions and experiments whenever testing of equipment has limitations. The current paper highlights the various slurry erosion and cavitation reduction techniques utilized by different researchers. Economic analysis conducted for a case study relevant to centrifugal pump (CP) usage in Pakistan shows that an 8% enhancement in pump efficiency can reduce the life cycle cost to about 17.6%, which could save up to USD 4281 for a single pump annually in Pakistan.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7865773 | PMC |
http://dx.doi.org/10.3390/ma14030521 | DOI Listing |
Data Brief
February 2025
Estación Experimental de Aula Dei, EEAD - CSIC, Ave. Montañana 1005, 50059 Zaragoza, Spain.
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View Article and Find Full Text PDFBraz Oral Res
January 2025
Universidade Federal da Paraíba - UFPB, Health Science Center Department of Clinical and Community Dentistry, João Pessoa, PB, Brazil.
This study aimed to evaluate the effectiveness of bioactive toothpastes in remineralizing eroded enamel surfaces in vitro. Bovine enamel blocks (n = 48) were obtained and classified into untreated, demineralized, and treated areas. Specimens were randomly classified into six groups (n = 8 each): fluoride-free toothpaste (NCT), Colgate Total 12 (PCT), Sensodyne Repair and Protect (SRP), Sensodyne Pronamel (SPE), Regenerador + Sensitive (RGS), and RGS/calcium booster (RCB).
View Article and Find Full Text PDFSci Rep
January 2025
School of Civil Engineering and Architecture, Anhui University of Science and Technology, AnHui Huainan, 232001, China.
In order to study the durability of solidified waste mud, dry-wet cycle experiments were carried out under the erosion of sodium chloride solutions with different concentrations. The unconfined compressive strength and mass change rate of solidified mud were studied and analyzed. The results show that when the number of dry-wet cycles increases, the unconfined compressive strength and mass of the sample show a downward trend.
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December 2024
The Ministry of Education Key Laboratory of High Efficiency Mining and Safety for Metal Mines & School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
Coarse particles in filling slurry are the primary factor causing wear in filling elbow pipes, and the wear mechanism of these particles on the pipes is influenced by various factors. To study the erosion and wear mechanism of elbow pipes caused by coarse particles, the motion state of coarse particles under different curvature radii, coarse particle gradations, and pipe diameters was investigated using a simulation method based on the coupling of Fluent and EDEM software, grounded in theories of fluid mechanics, rheology, and solid-liquid two-phase flow. The study explored the impact patterns and locations of wear induced by coarse particles on filling elbow pipes.
View Article and Find Full Text PDFMaterials (Basel)
October 2024
State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.
To clarify the deterioration behavior of magnesium oxychloride cement (MOC) under conditions of high humidity and high temperature, we first placed MOC slurry samples in a simulated environment with a relative humidity of 97 ± 1% and a temperature of 38 ± 2 °C; then, we observed the changes in the macroscopic and microscopic morphology, water erosion depth, bulk density, phase composition, and mechanical properties of the samples. The results show that, over time, under the promotion of high temperature, water molecules infiltrate the MOC samples. This results in the appearance of cracks on the macroscopic surface of the MOC samples due to the volume expansion caused by the hydrolysis of P5 (5Mg(OH)·MgCl·8HO) and the hydration of unreacted active MgO in the samples.
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