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    Wyświetlanie 1-4 z 4
    Tytuł:
    Outcome of nanofluid flow containing arbitrary shape nanoparticles induced by a permeable stretching sheet
    Autorzy:
    Sarkar, A.
    Kundu, P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/264501.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    przenoszenie ciepła
    nanociecze
    promieniowanie cieplne
    nanofluid
    heat transfer
    boundary layer flow
    thermal radiation
    permeable stretching sheet
    Opis:
    In this work we have discussed the impact of thermal radiation on heat transfer to nanofluid flow over an unsteady permeable stretching sheet using various types of arbitrary shape nanoparticles of Copper (Cu), Silver (Ag), Alumina [...], and Titania Oxide [...] in the base fluid. Suitable transformations have been employed to build ODEs from the partial differential equations. Numerical results are therefore obtained particularly for cylindrical shape and spherical shape nanoparticles. Our analysis substantiates that the velocity and temperature profiles increases with enhanced thermal radiation parameter. Further, Nusselt number is more advanced for the nanofluid that contains cylindrical shape nanoparticles as compared to spherical shape nanoparticles.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2020, 25, 2; 142-156
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Generation of surface waves due to initial axisymmetric surface disturbance in water with a porous bottom
    Autorzy:
    Kundu, P.
    Mandal, B. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/265312.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    transformata Laplace'a
    powierzchnia porowata
    transformata Henkel'a
    axisymmetric surface disturbance
    porous bottom
    Laplace and Hankel transform
    method of stationary phase
    free surface depression
    Opis:
    A two-dimensional Cauchy Poisson problem for water with a porous bottom generated by an axisymmetric initial surface disturbance is investigated here. The problem is formulated as an initial value problem for the velocity potential describing the motion in the fluid. The Laplace and Hankel transform techniques have been used in the mathematical analysis to obtain the form of the free surface in terms of a multiple infinite integral. This integral is then evaluated asymptotically by the method of stationary phase. The asymptotic form of the free surface is depicted graphically in a number of figures for different values of the porosity parameter and for different types of initial disturbances.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2019, 24, 3; 625-644
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods for automatic identification of coke ovens for auto positioning systems in coke plant of steel industries
    Autorzy:
    Patra, P.
    Kundu, C.
    Ghosh, A.
    Tudu, B.
    Bandyopadhyay, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/328517.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    LASER
    image processing
    RADAR
    RFID
    coke ovens
    stal
    przetwarzanie obrazów
    piec koksowniczy
    sterowanie
    kontrola
    Opis:
    Blast furnace operation requires highest quality raw materials, operation and operators. Among them coke is the most important, in terms of its effect on operation and hot metal quality. A good grade coke produces highest thermal energy and it is highly efficient in case of metal reduction. Usage of good grade coke to blast furnace will ensure lower coke rate, higher productivity and lower hot metal cost. In order to concentrate the carbon in coke the coke making process involves carbonation of coal to high temperature (1100°C) in oxygen free atmosphere. There is need to automate the coke oven operations as much as possible. In order to improve the level of control and management of coke oven, the research on intelligent control system is carried out. In modern advanced control system of coke oven, the control scheme of combination, feedback & feed-forward merged with management are widely utilized. The integrated management and control system of coke oven is introduced systematically, including the production plan and scheduling management (Dynamic scheduling) & heating control system (Mathematical modeling) i.e. evaluating battery temperature, intelligent combustion control and pressure control of gas collector of coke oven battery.
    Źródło:
    Diagnostyka; 2018, 19, 2; 95-103
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil temperature prediction from air temperature for alluvial soils in lower Indo-Gangetic plain
    Autorzy:
    Barman, D.
    Kundu, D.K.
    Pal, S.
    Chakraborty, A.K.
    Jha, A.K.
    Mazumdar, S.P.
    Saha, R.
    Bhattacharyya, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/25358.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Soil temperature is an important factor in biogeochemical processes. On-site monitoring of soil temperature is limited in spatio-temporal scale as compared to air temperature data inventories due to various management difficulties. Therefore, empirical models were developed by taking 30-year long-term (1985-2014) air and soil temperature data for prediction of soil temperatures at three depths (5, 15, 30 cm) in morning (0636 Indian standard time) and afternoon (1336 Indian standard time) for alluvial soils in lower Indo-Gangetic plain. At 5 cm depth, power and exponential regression models were best fitted for daily data in morning and afternoon, respectively, but it was reverse at 15 cm. However, at 30 cm, exponential models were best fitted for both the times. Regression analysis revealed that in morning for all three depths and in afternoon for 30 cm depth, soil temperatures (daily, weekly, and monthly) could be predicted more efficiently with the help of corresponding mean air temperature than that of maximum and minimum. However, in afternoon, prediction of soil temperature at 5 and 15 cm depths were more precised for all the time intervals when maximum air temperature was used, except for weekly soil temperature at 15 cm, where the use of mean air temperature gave better prediction.
    Źródło:
    International Agrophysics; 2017, 31, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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