Temat: slip effect - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Influence of the slipe effect on simply supported composite beam
Autorzy:: Pytlowany, T.
Tematy:: slip effect
composite beams
simply supported beam; Pokaż więcej
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Powiązania:: https://bibliotekanauki.pl/articles/115768.pdf Link otwiera się w nowym oknie
Opis:: The work concerns the slip effect which may occur in simply supported composite beams. The occurrence of the slip effect may lead to additional increase in beam deflection. The main reason for the increase is susceptibility of the anchor bolts that join the beam. The analysis of the slip effect occurrence is based on the following criteria: steel and concrete are linearly elastic, junction goes along the whole length of the considered beam, concrete slab and steel rib move by the same value along the whole length of the beam, simply supported beams are analysed. In order to present the slip effect in composite beams and its results, a numerical example is used. The example shows three kinds of the load capacity of anchor bolts as well as their impact on the slip effect and deflection of steel-concrete composite beams.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Slip effects on squeezing flow of nanofluid between two parallel disks
Autorzy:: Das, K.
Jana, S.
Acharya, N.
Tematy:: pole magnetyczne
tarcie
poślizg
nanofluid
slip effect
squeezing flow
magnetic field; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/264490.pdf Link otwiera się w nowym oknie
Opis:: In this study, the influence of temperature and wall slip conditions on the unsteady flow of a viscous, incompressible and electrically conducting nanofluid squeezed between two parallel disks in the presence of an applied magnetic field is investigated numerically. Using the similarity transformation, the governing coupled partial differential equations are transformed into similarity non-linear ordinary differential equations which are solved numerically using the Nachtsheim and Swigert shooting iteration technique together with the sixth order Runge-Kutta integration scheme. The effects of various emerging parameters on the flow characteristics are determined and discussed in detail. To check the reliability of the method, the numerical results for the skin friction coefficient and Nusselt number in the absence of slip conditions are compared with the results reported by the predecessors and an excellent agreement is observed between the two sets of results.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Boundary layer flow of magneto-micropolar nanofluid flow with Hall and ion-slip effects using variable thermal diffusivity
Autorzy:: Bilal, M.
Hussain, S.
Sagheer, M.
Tematy:: Hall effect
nanofluid
ion-slip effect
magneto-micropolar fluid
shooting method
Efekt Halla
płyn mikropolarny; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/202030.pdf Link otwiera się w nowym oknie
Opis:: In the present article, magneto-micropolar nanofluid flow with suction or injection in a porous medium over a stretching sheet for the heat and mass transfer is analyzed numerically. Both Hall and ion-slip effects are considered along with variable thermal diffusivity. The governing partial differential equations are transformed to ordinary differential equations using usual similarity transformations. These coupled non-linear differential equations are solved using the shooting method. Effects of prominent parameter on velocities, temperature and concentration are discussed graphically. Numerical values of skin-friction coefficient, local Nusselt number and local Sherwood number are also tabulated and discussed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Instantaneous angular speed: encoder-counter estimation compared with vibration data
Autorzy:: Spagnol, M.
Bregant, L.
Tematy:: instantaneous angular speed
encoder
elapsed time method
AC DC electrical machine
slip effect; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Powiązania:: https://bibliotekanauki.pl/articles/328776.pdf Link otwiera się w nowym oknie
Opis:: In rotating machinery, actions of the moving parts take place at specific angular positions rather than at specific times. For this reason, having a geometrical reference, such as the one provided by an encoder, and studying the Instantaneous Angular Speed (IAS) variations can provide a large amount of information about the health status of the machine. In fact, from the variation of the IAS during the machine loads’ cycle it is possible to identify defects and faults. The current work focuses on the estimation of the IAS through the Elapsed Time (ET) method, using a counter in order to measure the time elapsed between the pulses of an encoder. Both IAS and vibration measurement are conducted on an asynchronous four poles electrical motor driven by 50Hz line current, without load. The study compares the order analysis of both signals. The bearing’s Fundamental Train Frequency is detected using IAS estimation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Charakterystyki reologiczne puree owocowych i warzywnych
Rheological characteristics of fruit and vegetable puree
Autorzy:: Mickiewicz, D.
Kiljański, T.
Bomba, A.
Tematy:: poślizg przyścienny
rozrzedzanie ścinaniem
purée
karborund
slip-wall effect
shear-thinning
puree
carborundum; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2073149.pdf Link otwiera się w nowym oknie
Opis:: Celem pracy było określenie właściwości reologicznych puree owocowych i warzywnych. Do wyznaczenia charakterystyk zastosowano karborundową powierzchnię układu pomiarowego, eliminującą efekt poślizgu przy ściance. Wykazano, że wszystkie badane puree są płynami plastycznolepkimi silnie rozrzedzanymi ścinaniem z małymi granicami płynięcia. Wzrost ścinania powoduje spadek lepkości puree a to redukuje ich tłoczenie w instalacjach przemysłowych.
The aim of this study was to determine the rheological properties of fruit and vegetable puree. The karborundum surface of measuring system which eliminates the slip-wall effect was applied to determine rheological characteristics. It was shown that all mashed potatoes tested were viscoelastic fluids strongly shear-thinning with low yield stress. The increase of shear stress caused the decrease of puree viscosity and thereby the reduction of stamping in the industrial installation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Internal mechanism of asymmetric deformation and failure characteristics of the roof for longwall mining of a steeply dipping coal seam
Autorzy:: Luo, Shenghu
Wang, Tong
Wu, Yongping
Huangfu, Jingyu
Zhao, Huatao
Tematy:: odkształcenie
pokłady węgla
szyb kopalniany
steeply dipping seam
gangue
slip filling
deformation failure
main roof
angle effect; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/1853910.pdf Link otwiera się w nowym oknie
Opis:: Stability control of the roof is the key to safe and efficient mining of the longwall working face for a steeply dipping coal seam. In this study, a comprehensive analysis was performed on the roof destruction, migration, and filling characteristics of a steeply dipping longwall working face in an actual coalmine. Elastic foundation theory was used to construct a roof mechanics model; the effect of the coal seam inclination angle on the asymmetric deformation and failure of the roof under the constraint of an unbalanced gangue filling was considered. According to the model, increasing the coal seam angle, thickness of the immediate roof, and length of the working face as well as decreasing the thickness of the coal seam can increase the length of the contact area formed by the caving gangue in the lower area of the slope. Changes to the length of the contact area affect the forces and boundary conditions of the main roof. Increasing the coal seam angle reduces the deformation of the main roof, and the position of peak deflection migrates from the middle of the working face to the upper middle. Meanwhile, the position of the peak rotation angle migrates from the lower area of the working face to the upper area. The peak bending moment decreases continuously, and its position migrates from the headgate T-junction to the tailgate T-junction and then the middle of the working face. Field test results verified the rationality of the mechanics model. These findings reveal the effect of the inclination coal seam angle on roof deformation and failure and provide theoretical guidance for engineering practice.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Slip regime MHD 2-liquid plasma heat transfer flow with hall currents between parallel plates
Autorzy:: Linga Raju, T.
Satish, P.
Tematy:: przenikanie ciepła
efekt Halla
plazma
pole elektryczne
pole magnetyczne
immiscible slip flow
electric and magnetic fields
Hall effect
plasma
heat transfer; Pokaż więcej
Wydawca:: Uniwersytet Zielonogórski. Oficyna Wydawnicza
Powiązania:: https://bibliotekanauki.pl/articles/59123707.pdf Link otwiera się w nowym oknie
Opis:: The influence of the slip factor on the MHD 2-liquid heat transfer flow of ionized gases within a channel between two non-conducting plates with Hall currents is investigated theoretically. Slip conditions were used to obtain solutions for the velocity and temperature fields, as well as the heat transfer rates. The flow characteristics of the two liquids are studied for estimates of the leading parameters, for instance the magnetic parameter, Hall and slip factors, viscosity, density, height, electrical conductivity and the thermal conductivity ratios. It was observed that an upsurge in temperature in the two zones is caused by the thermal conductivity proportion. The rate of heat transfer coefficient diminishes up to a certain point, after that it starts to increase as the magnetic and Hall parameters increase.
Dostawca treści:: Biblioteka Nauki

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