Search results
Results from the WOW.Com Content Network
For liquid moving quickly over a surface, the contact angle can be altered from its value at rest. The advancing contact angle will increase with speed, and the receding contact angle will decrease. The discrepancies between static and dynamic contact angles are closely proportional to the capillary number, noted . [1]
Contact dynamics deals with the motion of multibody systems subjected to unilateral contacts and friction. [1] Such systems are omnipresent in many multibody dynamics applications. Consider for example
A CFD-DEM model is suitable for the modeling or simulation of fluid-solids or fluid-particles systems. In a typical CFD-DEM model, the phase motion of discrete solids or particles is obtained by the Discrete Element Method (DEM) which applies Newton's laws of motion to every particle [1] and the flow of continuum fluid is described by the local averaged Navier–Stokes equations that can be ...
The capillary number plays a role in the dynamics of capillary flow; in particular, it governs the dynamic contact angle of a flowing droplet at an interface. [ 6 ] Multiphase formulation
OpenFOAM (Open Field Operation And Manipulation) [8] is a C++ toolbox for the development of customized numerical solvers, and pre-/post-processing utilities for the solution of continuum mechanics problems, most prominently including computational fluid dynamics (CFD).
The most common way to measure surface energy is through contact angle experiments. [1] In this method, the contact angle of the surface is measured with several liquids, usually water and diiodomethane. Based on the contact angle results and knowing the surface tension of the liquids, the surface energy can be calculated. In practice, this ...
The simplest way of measuring the contact angle of a sessile drop is with a contact angle goniometer, which allows the user to measure the contact angle visually. A droplet is deposited by a syringe which is positioned above the sample surface, and a high resolution camera captures the image from the profile or side view.
If water has a contact angle between < <, then the surface is classed as hydrophilic, whereas a surface producing a contact angle between < < is hydrophobic. In the special cases where the Contact angle is 150 ∘ < θ {\displaystyle 150^{\circ }<\theta } , then it is known as superhydrophobic.