We review the historical and modern understanding of the most basic equation of friction, Amontons’ law, which describes phenomena that were already understood and studied by Leonardo da Vinci 500 years ago. This law states that for any two materials the (lateral) friction force is directly proportional to the (normal) applied load, with a constant of proportionality, the friction coefficient, ...

Previous studies on adaptation of fingertip forces to local friction at individual digit-object interfaces largely focused on static phases of manipulative tasks in which humans could rely on anticipatory control based on the friction in previous trials. Here we instead analyze mechanisms underlying this adaptation after unpredictable changes in local friction between consecutive trials. With t...

The main concern of this paper is to analyze the nonlinearity Grashof numbers (thermal and diffusion) on Williamson fluid flow across a stretching sheet with non-uniform thickness consideration melting heat transfer. modelled equations are non-dimensionalized utilization similarity transformations. We used shooting technique based Runge-Kutta 4th order method unriddle ensuing equations. Influen...

The objective of this PhD thesis was the study of friction in carbon nanotubes by analytical methods and molecular dynamics simulations. The goal of this research was to characterize the properties of friction in nanotubes and from a more general point of view the understanding of the microscopic origin of friction. Indeed, the relative simplicity of the system allows us to interpret more easil...

The present explore effort addresses the impact of radiation on MHD stream an incompressible nano fluid due to elongating piece by warm and mass fluxes border situation. Similarity transformations are applied attain self-similar equations which then solved numerically means shooting procedure alongside 4th order Runge-Kutta method. Features a variety sundry constraints non-dimensional stream, t...

In this thesis capillary dominated two–phase flow is studied by means of numerical simulations and experiments. The theoretical basis for the simulations consists of a phase field model, which is derived from the system’s thermodynamics, and coupled with the Navier Stokes equations. Two types of interfacial flow are investigated, droplet dynamics in a bifurcating channel and spontaneous capilla...

Local chain structure and local environment play an important role in the dynamics of polymer chains in miscible blends. In general, the friction coefficients that describe the segmental dynamics of the two components in a blend differ from each other and from those of the pure melts. In this work, we investigate polymer blend dynamics with Monte Carlo simulations of a generalized bond fluctuat...

Friction influences the nature of transfer layer formed at the interface between tool and metal during sliding. In the present investigation, basic studies were conducted using “Inclined Scratch Test” to understand the mechanism of transfer layer formation during sliding of super pure aluminium pins on EN8 steel flats of different surface roughness under both dry and lubricated conditions. The ...