Results 61 to 70 of about 397 (169)

Drag on spheres in micropolar fluids with non-zero boundary conditions for microrotations

Journal of Fluid Mechanics, 2007
The Stokes formula for the resistance force exerted on a sphere moving with constant velocity in a fluid is extended to the case of micropolar fluids. A non-homogeneous boundary condition for the micro-rotation vector is used: the micro-rotation on the boundary of the sphere is assumed proportional to the rotation rate of the velocity field on the ...
Hoffmann, Karl-Heinz, Marx, David, Botkin, N.D.   +2 more
openaire   +3 more sources

Drag on a permeable sphere placed in a micropolar fluid with non-zero boundary condition for microrotations [PDF]

Journal of Applied Mathematics and Computational Mechanics, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vandana Mishra, Bali Ram Gupta
openaire   +3 more sources

Regularity for Micropolar Fluid Equations Subjected to Hall Current

Journal of Applied Mathematics, Volume 2025, Issue 1, 2025.
In this paper, we consider the density‐dependent incompressible Hall‐magnetomicropolar fluid equations and establish a regularity condition involving the Lt1Lx∞ norm of the velocity gradient and the microrotational velocity gradient and the Lt2r/r−3Lxr norm of the magnetic field gradient for r > 3.
Mingyu Zhang, Arpan Hazra
wiley   +1 more source

Poisson's Ratio beyond the Classically Allowable Range in Chiral Isotropic Elastic Materials: Effect of k and Experiment

physica status solidi (b), Volume 261, Issue 12, December 2024.
Poisson's ratio in chiral isotropic elastic solids can be larger or smaller than the classical thermodynamic bounds. The effect of Cosserat coupling constant k is studied. Analysis shows that solids with weak coupling exhibit Poisson's ratio anomalies for larger specimen sizes than corresponding solids with strong coupling.
Roderic S. Lakes, Ballard Huey
wiley   +1 more source

Curved Three‐Director Cosserat Shells with Strong Coupling

Computer Graphics Forum, Volume 43, Issue 8, December 2024.
Abstract Continuum‐based shell models are an established approach for the simulation of thin deformables in computer graphics. However, existing research in physically‐based animation is mostly focused on shear‐rigid Kirchhoff‐Love shells. In this work we explore three‐director Cosserat (micropolar) shells which introduce additional rotational degrees ...
F. Löschner, J. A. Fernández‐Fernández, S. R. Jeske, J. Bender   +3 more
wiley   +1 more source

Double‐surface plasticity for micropolar continuum

Proceedings in Applied Mathematics and Mechanics, Volume 24, Issue 3, October 2024.
Abstract This work is concerned with the modeling of a cold‐box sand (CBS), a composition of sand grains and a resin binder. To this end, experiments are performed which show the following characteristics: localization phenomena in form of a shear band, softening behavior in the force‐displacement curve, asymmetric behavior for compression and tension.
Alexander Börger, Rolf Mahnken
wiley   +1 more source

Novel study of inertial forces on MHD peristaltically driven micropolar fluid through porous-saturated asymmetric channel: Finite Galerkin approach

AIP Advances
This focused study investigates the peristaltic motion of a micropolar fluid within an uneven channel filled with a porous medium, incorporating an orthogonal magnetic field to the flow.
Bilal Ahmed, Liaqat Ali, Fizza Anwar
doaj   +1 more source

Thermally stratified non-homogeneous Buongiorno model for unsteady micropolar tetra-hybrid nanofluid flow analysis over howarth’s wavy cylinder with motile microbes

South African Journal of Chemical Engineering
This study examines the unsteady three-dimensional stagnation-point flow of a micropolar tetra-hybrid nanofluid over Howarth’s wavy cylinder in the presence of motile microorganisms and a transverse magnetic field. The tetra-hybrid nanofluid comprises Au−
Sadia Shakir, Saima Zainab, Noreen Sher Akbar, Shahah Almutairi, S. Saleem, Bassel Seif El Dine   +5 more
doaj   +1 more source

A micropolar model accounting for asymmetric behavior of cold‐box sand in relation to tensile and compression tests

Proceedings in Applied Mathematics and Mechanics, Volume 24, Issue 1, June 2024.
Abstract Cold‐box sand (CBS) belongs to the granular materials and consists of sand and a binder. The behavior of CBS is simulated with a micropolar model, whereby the additional degree of freedom of the model describes the rotation of the sand grains. The model is used to generate a shear band under pressure for three different meshes, where the force‐
Alexander Börger, Rolf Mahnken
wiley   +1 more source

Investigation of MHD micropolar flow between a stationary and a rotating disc: Keller-box solution

Cogent Engineering
In the present investigation, magnetohydrodynamic (MHD) micropolar fluid flow between a stationary disc and a rotating disc with a constant angular velocity is considered. The study investigates the effect of magnetic field and microrotation structure on
Param R. Tangsali, Ashwini Bhat, Nagaraj N. Katagi   +2 more
doaj   +1 more source