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Exact solutions for fractionalized second grade fluid flows with boundary slip effects

Dehraj S., Malookani R. A., Aasoori S. K., Bhutto G. M., Arain L.

International Journal of Applied Mechanics and Engineering

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2021

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Vol. 26, no. 1

88--103

EN

In this paper, an exact analytical solution for the motion of fractionalized second grade fluid flows moving over accelerating plate under the influence of slip has been obtained. A coupled system of partial differential equations representing the equation of motion has been re-written in terms of fractional derivatives form by using the Caputo fractional operator. The Discrete Laplace transform method has been employed for computing the expressions for the velocity field […] and the corresponding shear stress […]. The obtained solutions for the velocity field and the shear stress have been written in terms of Wright generalized hypergeometric function pqψ and are expressed as a sum of the slip contribution and the corresponding no-slip contribution. In addition, the solutions for a fractionalized, ordinary second grade fluid and Newtonian fluid in the absence of slip effect have also been obtained as special case. Finally, the effect of different physical parameters has been demonstrated through graphical illustrations.

2

Analiza realizacji przeglądów technicznych ciągników rolniczych

Buchwald T., Staszak Ż.

Inżynieria Rolnicza

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2013

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R. 17, nr 3, t. 2

47--55

PL

W celu analizy realizacji przeglądów technicznych ciągników rolniczych, wykonano badania procesów ich utrzymywania, związanych z wymianami materiałów eksploatacyjnych - olejów i filtrów. Badania wykonano, wykorzystując kwestionariusz ankietowy, skierowany do zakładów zajmujących się serwisowaniem maszyn. Pytano o najczęściej występujące awarie, wynikające z zaniechania planowanej obsługi ciągników. Ponadto podjęto rozważania dotyczące zagadnienia związanego z zagospodarowaniem zużytych materiałów eksploatacyjnych, olejów i smarów oraz filtrów w zakładach serwisowych maszyn rolniczych. Dodatkowo przeprowadzono obliczenia, pozwalające wskazać wysokość kosztów oraz czas trwania serwisu technicznego wybranych ciągników rolniczych o mocy 100 KM w okresie jednego cyklu obsługowego.

EN

In order to analyse the realization of the technical service of tractors, research of technical service and replacement demand including oils and filters demand was carried out. Investigation was conducted with the use of a survey addressed to people working in machine services establishments. The survey includes questions about the most common breakdowns of tractors, resulting from the discontinuation of the planned service and about the most common effects of discontinuing maintenance of tractors. In addition, issue concerning the management of waste materials, oils, greases and filters was considered. Moreover, the calculations have been carried out, which allowed indication of the amount of the cost of maintenance service of the selected tractors with 100 KM power within one service cycle.

3

Recykling płynów eksploatacyjnych ze złomowanych samochodów

Jakóbiec J., Wysopal G.

Paliwa, Oleje i Smary w Eksploatacji

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2001

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R. 10, nr 82

14-17

EN

Regulations concerned with procedures covering wastes generating in result of car-breaking have been presented. A description of recycling process of various materials obtained from wasted cars has been given. It was estimated that in Poland, operational fluids originating from car-breaking are treating to the environment. A solution concept of the problem, in accordance with environmental regulations has been presented.