Results 11 to 20 of about 99 (92)
SPE Polymers, Volume 4, Issue 2, Page 63-79, April 2023., 2023 Abstract Rubber compounds have an increased tendency to flow anomalies depending on the compound ingredients and the processing parameters. Due to wall slip effects, rheological material measurements and the material parameters derived from them are affected by errors, since the fundamental analytical and numerical calculation approaches assume wall ...
Dennis Kleinschmidt, Volker Schöppner
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Chemical Engineering &Technology, Volume 46, Issue 1, Page 95-101, January 2023., 2023 The bulk shear and wall slip of a confined nonpolar lubricant, a complex branched‐hydrocarbon oil, were studied using molecular dynamics simulation. Different temperatures and molecular masses were investigated for a Couette flow. As the number of branches of the liquid molecule increases, the shear stresses and the wall slip increase.
Seyedmajid Mehrnia, Peter F. Pelz
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Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 The actual contact point of a spiral bevel gear pair deviates from the theoretical contact point due to the gear deformation caused by the load. However, changes in meshing characteristics due to the migration of contact points are often ignored in previous studies on the elastohydrodynamic lubrication (EHL) analysis of spiral bevel gears.
Xiaoyu Sun +4 more
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Mathematical Problems in Engineering, Volume 2020, Issue 1, 2020., 2020 Most articles choose the transcendental function B1(rrn) to define the finite Hankel transform, and very few articles choose B0(rrn). The derivations of B0(rrn) and B1(rrn) are also considered the same. In this paper, we find that the derivative formulas for the transcend function BN(rrn) are different and prove the derivative formulas for B0(rrn) and ...
Fang Wang +2 more
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Shock and Vibration, Volume 2018, Issue 1, 2018., 2018 We proposed a Chebyshev spectral method with a null space approach for investigating the boundary‐value problem of a nonprismatic Euler‐Bernoulli beam with generalized boundary or interface conditions. It is shown here that, with few vital improvements, a Chebyshev spectral collocation approach can be systematically applied to modeling nonprismatic ...
C. P. Hsu +3 more
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Normal Stress Differences and Yield Stresses in Attractive Particle Networks
Advances in Condensed Matter Physics, Volume 2016, Issue 1, 2016., 2016 The nature of attractive particulate networks, yield stresses, and normal stress differences is systematically reviewed, each in terms of the relevant definitions, underlying mechanisms, and current measurement techniques. With this foundation, experimental observations of normal stress differences in some suspensions and colloidal systems are surveyed,
David I. Verrelli +2 more
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Improving the Validity of Squeeze Film Air‐Damping Model of MEMS Devices with Border Effect
Journal of Applied Mathematics, Volume 2014, Issue 1, 2014., 2014 Evaluation of squeezed film air damping is critical in the design and control of dynamic MEMS devices. The published squeezed film air damping models are generally derived from the analytical solutions of Reynolds equation or its other modified forms under the supposition of trivial pressure boundary conditions on the peripheral borders.
Cheng Bai, Jin Huang, Ricardo Perera
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Analysis of the Magnetic Field Influence on the Rheological Properties of Healthy Persons Blood
BioMed Research International, Volume 2013, Issue 1, 2013., 2013 The influence of magnetic field on whole blood rheological properties remains a weakly known phenomenon. An in vitro analysis of the magnetic field influence on the rheological properties of healthy persons blood is presented in this work. The study was performed on blood samples taken from 25 healthy nonsmoking persons and included comparative ...
Anna Marcinkowska-Gapinska +2 more
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Mathematical Problems in Engineering, Volume 2011, Issue 1, 2011., 2011 Modern engineering technology involves the micropolar magnetohydrodynamic flow of magnetic fluids. Here, we consider a colloidal suspension of non‐conductive ferromagnetic material, which consists of small spherical particles that behave as rigid magnetic dipoles, in a carrier liquid of approximately zero conductivity and low‐Reynolds number properties.
Panayiotis Vafeas +3 more
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Starting solutions for some simple oscillating motions of second‐grade fluids
Mathematical Problems in Engineering, Volume 2006, Issue 1, 2006., 2006 The exact starting solutions corresponding to the motions of a second‐grade fluid, due to the cosine and sine oscillations of an infinite edge and of an infinite duct of rectangular cross‐section as well as those induced by an oscillating pressure gradient in such a duct, are determined by means of the double Fourier sine transforms.
C. Fetecau, Corina Fetecau
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