22 papers · ranked by Valyu relevance
Junaid Ahmad Khan, Meraj Mustafa, Tasawar Hayat, Ahmed Alsaedi + 1 more
'Zhonghao Rao'] This article studies the viscous flow and heat transfer over a plane horizontal surface stretched non-linearly in two lateral directions. Appropriate wall conditions characterizing the non-linear variation in the velocity and temperature of the sheet are employed for the first time. A new set of…
Imran Ullah, Krishnendu Bhattacharyya, Sharidan Shafie, Ilyas Khan + 1 more
'Saima Noreen'] Numerical results are presented for the effect of first order chemical reaction and thermal radiation on mixed convection flow of Casson fluid in the presence of magnetic field. The flow is generated due to unsteady nonlinearly stretching sheet placed inside a porous medium. Convective conditions on…
Junaid Ahmad Khan, M. Mustafa, T. Hayat, M. Sheikholeslami + 2 more
'A. Alsaedi' 'Xiao-Dong Wang'] This work deals with the three-dimensional flow of nanofluid over a bi-directional exponentially stretching sheet. The effects of Brownian motion and thermophoretic diffusion of nanoparticles are considered in the mathematical model. The temperature and nanoparticle volume fraction at the…
Jitender Singh, U. S. Mahabaleshwar, Gabriella Bognár
Motivated from numerous practical applications, the present theoretical and numerical work investigates the nonlinear magnetohydrodynamic (MHD) laminar boundary layer flow of an incompressible, viscous fluid over a porous stretching sheet in the presence of suction/injection (mass transpiration). The flow…
Fekry M Hady, Fouad S Ibrahim, Sahar M Abdel-Gaied, Mohamed R Eid
In this work, we study the flow and heat transfer characteristics of a viscous nanofluid over a nonlinearly stretching sheet in the presence of thermal radiation, included in the energy equation, and variable wall temperature. A similarity transformation was used to transform the governing partial differential…
Imran Ullah, Ilyas Khan, Sharidan Shafie
Unsteady mixed convection flow of Casson fluid towards a nonlinearly stretching sheet with the slip and convective boundary conditions is analyzed in this work. The effects of Soret Dufour, viscous dissipation and heat generation/absorption are also investigated. After using some suitable transformations, the unsteady…
W. Abbas, Ahmed M. Megahed, M. S. Emam, Hassan M. H. Sadek
The novelty and motivation of this research can be emphasized by examining how the heat transfer mechanism of a non-Newtonian Powell-Eyring fluid, which flows because of a stretched sheet, is affected by factors like viscous dissipation, the slip velocity phenomenon, and Joule heating. In addition, the investigation…
Yijiang Yu, Michael D. Graham
The conformation of a long linear polymer dissolved in fluid and exposed to an extensional flow is wellknown to exhibit a "coil-stretch" transition, which for sufficiently long chains can lead to bistability. The present work reports computations indicating that an analogous "compact-stretched" transition arises in the…
Tasawar Hayat, Sadia Asad, Meraj Mustafa, Ahmed Alsaedi + 1 more
'Gongnan Xie'] This study investigates the unsteady flow of Powell-Eyring fluid past an inclined stretching sheet. Unsteadiness in the flow is due to the time-dependence of the stretching velocity and wall temperature. Mathematical analysis is performed in the presence of thermal radiation and non-uniform heat…
M. Hopwood, B. Harding, J. E. F. Green, Rosemary Dyson
Many biological materials such as cervical mucus and collagen gel possess a fibrous micro-structure. This micro-structure affects the emergent mechanical properties of the material, and hence the functional behaviour of the system. We consider the canonical problem of stretching a thin sheet of transversely-isotropic…
Siddarth Srinivasan, Zhiyan Wei, L. Mahadevan
Motivated by the redrawing of hot glass into thin sheets, we investigate the shape and stability of a thin viscous sheet that is inhomogeneously stretched in an imposed non-uniform temperature field. We first determine the associated base flow by solving the long-timescale stretching flow of a flat sheet as a function…
Yijiang Yu, Michael D. Graham
The processing of thin-structured materials in a fluidic environment, from nearly inextensible but flexible graphene sheets to highly extensible polymer films, arises in many applications. So far, little is known about the dynamics of such thin sheets freely suspended in fluid. In this work, we study the dynamics of…
Madoka Suzuki, Keiko Kawauchi, Hiroaki Machiyama, Hiroaki Hirata + 2 more
Freestanding cell-sheets are valuable bio-materials for use in regenerative medicine and tissue engineering. Because cell-sheets experience various mechanical stimulations during handling, it is important to understand the responses of cells to these stimulations. Here, we demonstrate changes in the localization of…
A.H. Erhardt, D. Peschka, C. Dazzi, L. Schmeller + 4 more
We develop a three-dimensional mathematical model framework for the collective evolution of cell populations by an agent-based model (ABM) that mechanically interacts with the surrounding extra-cellular matrix (ECM) modeled as a hydrogel. We derive effective two-dimensional models for the geometrical set-up of a thin…
Anselmo Soeiro Pereira, Nicolas Valade, Elie Hachem, Rudy Valette
In this work, we extend the analyses devoted to Newtonian viscous fluids previously reported by Ribe [Physical Review E 68, 036305 (2003)], by investigating shear thickening (dilatant) and shear thinning (pseudoplastic) effects on the development of folding instabilities in non-Newtonian viscous sheets of which…
Shannon Li, Alyssa Gee, Nathan Cai, Alexandra Bermudez + 1 more
The ability to simultaneously measure material mechanics and structure is central for understanding their nonlinear relationship that underlies the mechanical properties of materials, such as hysteresis, strain-stiffening and -softening, and plasticity. This experimental capability is also critical in biomechanics and…
Nada M. Kafour, Noor A. Al-Maslamani, Badria F. Al-Sammak, Henning F. Horn
Mechanical forces have a major effect on cell behavior. Most cells in vitro are grown under static conditions on hard tissue culture plastic, conditions that do not accurately reflect living tissues. The ability of cells to sense and respond to mechanical forces is essential for key biological processes, including…
Kevin C. Hart, Joo Yong Sim, Matthew A. Hopcroft, Daniel J. Cohen + 3 more
Mechanical forces regulate many facets of tissue biology. Studying the effects of forces on cells requires real-time observations of single- and multi-cell dynamics in tissue models during controlled external mechanical input. Many of the existing devices used to conduct these studies are costly and complicated to…
Authors not listed
Synthetic spider silk fibers currently achieve tensile strengths up to approximately 1.2 gigapascals (GPa), limiting their deployment in advanced protective materials. This theoretical study presents a novel, four-stage bio-engineering protocol for recombinant spider silk (rSpidroin) fibers with predicted ultimate…
Justin Kwok, Giridar Vishwanathan, Kyung Sun Park, Bijal Patel + 3 more
Fluid flow is an inherent aspect of solution processing of conjugated polymers. Much of the existing work investigating the effect of flow has been phenomenological, lacking a direct and quantitative connection between the flow gradients and measurable quantities of the conformation or alignment of the conjugated…
Authors not listed
We present a coupled-oscillator toy model that describes the low-frequency lattice-like vibrations observed in Raman and inelastic neutron scattering spectra of β-sheet structures found in amyloid fibrils. In this model, the strands of the fibril β-sheet structures are treated as harmonically oscillating rods with…
David González-Martínez, Mabel Barreiro Carpio, Aidee Arizpe Tafoya, Eduardo González-Martínez + 2 more
Extrusion 3D bioprinting is a technology that allows the deposition of cells within hydrogels in well-defined spatial patterns, facilitating the fabrication of tissue biomimetics. Gelatin methacrylate (GelMA)-based hydrogels are biocompatible, biodegradable, and promote cell adhesion and proliferation, which makes them…