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Wyszukujesz frazę "Patel, N. D." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Investigation of a Jeffery-Hamel flow between two rectangular inclined smooth walls using the differential Transform Method
    Autorzy:
    Patel, N. D.
    Meher, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/122393.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Differential Transform Method
    Jeffery-Hamel flow
    higher order non-linear ordinary differential equation
    metoda transformacji różnicowej
    DTM
    przepływ Jeffery-Hamela
    nieliniowe równanie różniczkowe
    Opis:
    In this article, the Differential Transform Method (DTM) is applied to derive a semi-analytic solution for the non-linear MHD (Magneto Hydro Dynamics) Jeffery-Hamel flow between rectangular inclined smooth planes. A non-linear ordinary differential equation of order four is obtained from Navier-Stokes equations using similar transformation. A comparison between DTM, PM (Perturbation Method) and numerical solution is shown here to validate the obtained results with its convergence analysis for different values of m and a Reynolds number in divergent channels.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2018, 17, 4; 47-57
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on magneto hydrodynamics Jeffery-Hamel flow with heat transfer problem in Eyring-Powell fluid using differential transform method
    Autorzy:
    Meher, Ramakanta
    Patel, N. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/122591.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    Differential Transform Method
    Jeffery-Hamel flow
    Eyring-Powell fluid
    heat transfer
    metoda transformacji różnicowej
    przepływ Jeffery-Hamela
    przenikanie ciepła
    płyn Eyringa-Powella
    Opis:
    In this paper, we study and analyse the variations of velocity profiles for different values of the Reynolds number, Eckert number, Prandtl number and Hartmann number in the Magneto Hydrodynamics Jeffery-Hamel flow with heat transfer in Eyring-Powell fluid in both divergent and convergent channels. The Differential Transform Method (DTM) is used to obtain an analytical solution of the Jeffery Hamel flow problem and to determine the velocity profiles of the fluid flow. Finally, the efficiency of DTM has been shown, and the results have been validated by comparing the obtained results with the numerical results (fourth order RK method) in both convergent and divergent channels.
    Źródło:
    Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 3; 57-68
    2299-9965
    Pojawia się w:
    Journal of Applied Mathematics and Computational Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Rare Earth Sm Addition on Microstructure and Tensile Properties of Al-Si-Cu 319 Alloy
    Autorzy:
    Patel, D. N.
    Sutaria, Mayur P.
    Powiązania:
    https://bibliotekanauki.pl/articles/27314115.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Al-Si-Cu alloy
    addition
    Samarium
    SDAS
    eutectic silicon
    tensile properties
    stop Al-Si-Cu
    dodatki
    Samar
    krzem eutektyczny
    właściwości wytrzymałościowe
    Opis:
    In the present investigation, the influence of addition of the rare earth element samarium (Sm) in different concentrations (0, 0.1, 0.3, 0.5, 0.7 and 0.9wt.%) on the microstructure and tensile properties of the Al-Si-Cu 319 alloy have been evaluated. Microstructural constituents such as SDAS of α-Al and characteristics of eutectic silicon particles were observed by optical microscopy. It was concluded from the findings that Sm addition reduces the size of secondary dendrite arm spacings (SDAS) and altered the morphology of the eutectic silicon particles from needle-like to lamellar and smaller segments. The tensile properties of the Al-Si-Cu 319 alloy improved with the concentration of Sm. It was found that the highest tensile properties were obtained at 0.7wt.% addition of Sm, i.e., 55.5% higher than unmodified 319 alloy. With the further addition of the Sm above 0.7wt.%, it does not improve the tensile properties of the alloy. This can be attributed to the precipitation of the brittle and needle like quaternary Sm-rich intermetallic compounds observed through Scanning electron microscopy.
    Źródło:
    Archives of Foundry Engineering; 2023, 23, 1; 25--33
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimal credit period and ordering quantity for credit dependent trended demand and deteriorating items with maximum lifetime
    Autorzy:
    Shah, N. H.
    Shah, D. B.
    Patel, D. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/970075.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Badań Systemowych PAN
    Tematy:
    inventory
    trended demand
    trade credit
    default risk
    deterioration
    maximum lifetime
    Opis:
    In this paper, an inventory system is analyzed regarding a trended demand. The seller offers its buyer a credit period for settling the account, which attracts more buyers and enhances market demand. However, the offer of credit period leads to default risk for the supplier. The units in inventory are deteriorating continuously and also have definite maximum lifetime. The aim is to maximize the profit of the retailer. Numerical examples are given to validate the developed mathematical model. Sensitivity analysis is performed to obtain the critical inventory parameters and deduce the managerial strategies.
    Źródło:
    Control and Cybernetics; 2015, 44, 2; 311-320
    0324-8569
    Pojawia się w:
    Control and Cybernetics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and in vitro antibacterial and antifungal evaluation of quinoline analogue azetidin and thiazolidin derivatives
    Autorzy:
    Prajapati, S. M
    Vekariya, R. H.
    Patel, K. D.
    Panchal, S. N.
    Patel, H. D.
    Rajani, D. P.
    Rajani, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412324.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antibacterial
    antifungal
    quinoline
    azetidin derivatives
    thiazolidin derivatives
    Opis:
    A library of quinoline analog two novel series of azetidin (SH1-5) and thiazolidin (SHa-e) derivatives were designed and synthesized with simple and eco-friendly methodologies. The structures of the compounds were elucidated with the aid of elemental analysis, IR, 1H-NMR and mass spectral data. These novel synthesized compounds were evaluated for antibacterial activity against two gram-positive bacteria (Staphylococcus aureus, Staphylococcus pyogenus) and two gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli). The title compounds were also studied for their antifungal activity with Candida albicans, Aspergillus niger, Aspergillus clavatus using the broth dilution technique. Most of the compounds were the best bio-active desired antibacterial analog with less MIC value against different tested strains.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 20, 2; 195-210
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and Characterization of N-Methyl Indole Derivatives via Desulfitative Displacement by Various Amines and Its Antimicrobial Activity
    Autorzy:
    Chodvadiya, Vijay D.
    Pambhar, Kaushik D.
    Parmar, Nilesh D.
    Dhamsaniya, Ashish P.
    Safi, Shahrukh khan A.
    Chhatbar, Pratiksha V.
    Ram, Hemal N.
    Khunt, Ranjan C.
    Patel, P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1065130.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anti-microbial agents
    Desulfitative displacement
    N-methyl indole
    S-methyl
    Opis:
    A modular three step synthetic approach of N-methyl indole derivatives has been carried out by the condensation of N-methyl indole with cyanoacetic acid using acetic anhydride as solvent to yield 3-cyanoacetyl N-methyl indole, which further reacts with carbon disulphide and methyl iodide in basic condition to obtain 2-(1-methyl-1H-indole-3-carbonyl)-3,3-bis(methylthio)acrylonitrile as a scaffold. Subsequent, the scaffold when reacts with substituted various amine derivatives via desulfitative displacement forms new derivatives of 3-((substitutedphenyl)amino)-2-(1-methyl-1H-indole-3-carbonyl)-3-(methylthio)acrylonitrile in moderate to good yields. All the novel compounds were evaluated for their antimicrobial activity against Gram+ve and Gram-ve bacteria and different fungal species which demonstrated well to moderate antimicrobial activity.
    Źródło:
    World Scientific News; 2019, 120, 2; 181-191
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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