Body force
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Force and heat current formulas for many-body potentials in molecular dynamics simulations with applications to thermal conductivity calculations Open
© 2015 American Physical Society. We derive expressions of interatomic force and heat current for many-body potentials such as the Tersoff, the Brenner, and the Stillinger-Weber potential used extensively in molecular dynamics simulations…
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Approaching a realistic force balance in geodynamo simulations Open
Significance Flow in Earth’s liquid core is expected to be primarily governed by the Coriolis force due to Earth’s rotation, the buoyancy force driving the convection, and the Lorentz force due to the geomagnetic field. A relevant geodynam…
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Laminarisation of flow at low Reynolds number due to streamwise body force Open
It is well established that when a turbulent flow is subjected to a non-uniform body force, the turbulence may be significantly suppressed in comparison with that of the flow of the same flow rate and hence the flow is said to be laminaris…
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Microscopic origins of the swim pressure and the anomalous surface tension of active matter Open
The unique pressure exerted by active particles-the "swim" pressure-has proven to be a useful quantity in explaining many of the seemingly confounding behaviors of active particles. However, its use has also resulted in some puzzling findi…
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The swim force as a body force Open
Average swim force acts like an internal body force applied on active particles, which allows a continuum mechanics description.
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Insight into the dynamics of non-Newtonian Casson fluid over a rotating non-uniform surface subject to Coriolis force Open
Casson fluid model is the most accurate mathematical expression for investigating the dynamics of fluids with non-zero plastic dynamic viscosity like that of blood. Despite huge number of published articles on the transport phenomenon, the…
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Failure modes and conditions of a cohesive, spherical body due to YORP spin-up Open
This paper presents transition of the failure mode of a cohesive, spherical\nbody due to YORP spin-up. On the assumption that the distribution of materials\nin the body is homogeneous, failed regions first appearing in the body at\ndiffere…
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A SPH framework for dynamic interaction between soil and rigid body system with hybrid contact method Open
Summary A smoothed particle hydrodynamics (SPH) framework for three‐dimensional dynamic soil‐multibody interaction modeling is presented, where both soils and rigid bodies are discretized using SPH particles. In the framework, soils are mo…
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A novel and effective way to impose boundary conditions and to mitigate the surface effect in state‐based Peridynamics Open
Peridynamics is a nonlocal continuum theory capable of modeling effectively crack initiation and propagation in solid bodies. However, the nonlocal nature of this theory is the cause of two main problems near the boundary of the body: an u…
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Phase coexistence of active Brownian particles Open
We investigate motility-induced phase separation of active Brownian particles, which are modeled as purely repulsive spheres that move due to a constant swim force with freely diffusing orientation. We develop on the basis of power functio…
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Atomic Permutationally Invariant Polynomials for Fitting Molecular Force\n Fields Open
We introduce and explore an approach for constructing force fields for small\nmolecules, which combines intuitive low body order empirical force field terms\nwith the concepts of data driven statistical fits of recent machine learned\npote…
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Numerical study of magnetohydrodynamic pulsatile flow of Sutterby fluid through an inclined overlapping arterial stenosis in the presence of periodic body acceleration Open
In the present theoretical investigation, we have numerically simulated the problem of blood flow through an overlapping stenosed arterial blood vessel under the action of externally applied body acceleration and the periodic pressure grad…
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Enhanced Core-Mantle Coupling Due to Stratification at the Top of the Core Open
Fluctuations in the length of day (LOD) over periods of several decades are commonly attributed to exchanges of angular momentum between the mantle and the core. However, the forces that enable this exchange are less certain. Suggestions i…
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Fluid–rigid-body interaction simulations and validations using a coupled stabilized ISPH–DEM incorporated with the energy-tracking impulse method for multiple-body contacts Open
In this paper, a new particle-based fluid–rigid-body interaction simulator for violent free-surface flow problems is developed. The incompressible Smoothed Particle Hydrodynamics (ISPH) method has been proven to produce a smooth and accura…
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A variant of the linear isotropic indeterminate couple-stress model with symmetric local force-stress, symmetric nonlocal force-stress, symmetric couple-stresses and orthogonal boundary conditions Open
In this paper we venture a new look at the linear isotropic indeterminate couple-stress model in the general framework of second-gradient elasticity and we propose a new alternative formulation which obeys Cauchy–Boltzmann’s axiom of the s…
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How Activity Landscapes Polarize Microswimmers without Alignment Forces Open
Active-particle suspensions exhibit distinct polarization-density patterns in activity landscapes, even without anisotropic particle interactions. Such polarization without alignment forces is at work in motility-induced phase separation a…
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Ballistic near-field heat transport in dense many-body systems Open
International audience
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Time-dependent lift and drag on a rigid body in a viscous steady linear flow Open
We compute the leading-order inertial corrections to the instantaneous force acting on a rigid body moving with a time-dependent slip velocity in a linear flow field, assuming that the square root of the Reynolds number based on the fluid-…
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A scaling law for the recirculation zone length behind a bluff body in reacting flows Open
The recirculation zone length behind a bluff body is influenced by the turbulence intensity at the base of the body in isothermal flows and also the heat release and its interaction with turbulence in reacting flows. This relationship is o…
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Impact of driving forces on molten pool in gas metal arc welding Open
A numerical scrutiny was performed to analyze the effect of driving forces on molten pool in gas metal arc welding. In addition to the basic governing equations required for a general heat and mass transfer analysis by computational fluid …
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Structural Nonequilibrium Forces in Driven Colloidal Systems Open
We identify a structural one-body force field that sustains spatial inhomogeneities in nonequilibrium overdamped Brownian many-body systems. The structural force is perpendicular to the local flow direction, it is free of viscous dissipati…
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A Highly Resolved Large-Eddy Simulation of a Wind Turbine using an Actuator Line Model with Optimal Body Force Projection Open
When representing the blade aerodynamics with rotating actuator lines, the computed forces have to be projected back to the CFD flow field as a volumetric body force. That has been done in the past with a geometrically simple uniform three…
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Engineering Mechanics: Statics & Dynamics Open
STATICS 1. General Principles. Mechanics. Fundamental Concepts. Units of Measurement. The International System of Units. Numerical Calculations. 2. Force Vectors. Scalars and Vectors. Vector Operations. Vector Addition of Forces. Addition …
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Internal Stresses Lead to Net Forces and Torques on Extended Elastic Bodies Open
A geometrically frustrated elastic body will develop residual stresses arising from the mismatch between the intrinsic geometry of the body and the geometry of the ambient space. We analyze these stresses for an ambient space with gradient…
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Lift force in odd compressible fluids Open
When a body moves through a fluid, it can experience a force orthogonal to its movement called lift force. Odd viscous fluids break parity and time-reversal symmetry, suggesting the existence of an odd lift force on tracer particles, even …
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Custom flow in overdamped Brownian dynamics Open
When an external field drives a colloidal system out of equilibrium, the ensuing colloidal response can be very complex, and obtaining a detailed physical understanding often requires case-by-case considerations. To facilitate systematic a…
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Material Flow Behavior on Weld Pool Surface in Plasma Arc Welding Process Considering Dominant Driving Forces Open
In this study, the effect of oxygen in the shielding gas on the material flow behavior of the weld pool surface was discussed to clarify the dominant driving weld pool force in keyhole plasma arc welding (KPAW). To address this issue, the …
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Role of Lithospheric Buoyancy Forces in Driving Deformation in East Africa From 3D Geodynamic Modeling Open
Despite decades of investigation, the origin of forces driving continental rifting remains highly debated. Deciphering their relative contributions is challenging due to the nonlinear and depth‐dependent nature of lithospheric rheology. Re…
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Theoretical analysis of transient natural convection flow in a vertical microchannel with electrokinetic effect Open
In this article, a theoretical analysis is carried out to understand the role of electrokinetic effect on transient natural convection flow in a vertical microchannel. By incorporating the electrokinetic body force and the natural convecti…
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Magnetic forces in paramagnetic fluids Open
An overview of the effect of a magnetic field gradient on fluids with linear magnetic susceptibilities is given. It is shown that two commonly encountered expressions, the magnetic field gradient force and the concentration gradient force …