Simulations of slip flow on nanobubble-laden surfaces.

12:04 EDT 22nd May 2015 | BioPortfolio

Summary of "Simulations of slip flow on nanobubble-laden surfaces."

On microstructured hydrophobic surfaces, geometrical patterns may lead to the appearance of a superhydrophobic state, where gas bubbles at the surface can have a strong impact on the fluid flow along such surfaces. In particular, they can strongly influence a detected slip at the surface. We present two-phase lattice Boltzmann simulations of a flow over structured surfaces with attached gas bubbles and demonstrate how the detected slip depends on the pattern geometry, the bulk pressure, or the shear rate. Since a large slip leads to reduced friction, our results give assistance in the optimization of microchannel flows for large throughput.

Affiliation

MTT Agrifood Research Finland, FI-31600 Jokioinen, Finland.

Journal Details

This article was published in the following journal.

Name: Journal of physics. Condensed matter : an Institute of Physics journal
ISSN: 1361-648X
Pages: 184106

Links

PubMed Articles [8793 Associated PubMed Articles listed on BioPortfolio]

Velocity slip on curved surfaces.

The Navier boundary condition for velocity slip on flat surfaces, when expressed in tensor form, is readily extended to surfaces of any shape. We test this assertion using molecular dynamics simulatio...

Gas cushion model and hydrodynamic boundary conditions for superhydrophobic textures.

Superhydrophobic Cassie textures with trapped gas bubbles reduce drag, by generating large effective slip, which is important for a variety of applications that involve a manipulation of liquids at th...

Flow and slip transition in nanochannels.

We experimentally investigate the Poiseuille flows in nanochannels. It is found that the flow rate undergoes a transition between two linear regimes as the shear rate is varied. The transition indicat...

Dynamical role of slip heterogeneities in confined flows.

We demonstrate that flows in confined systems are controlled by slip heterogeneities below a certain size. To show this we image the motion of soft glassy suspensions in microchannels whose inner wall...

Dynamics of Atomic Stick-Slip Friction Examined with Atomic Force Microscopy and Atomistic Simulations at Overlapping Speeds.

Atomic force microscopy (AFM) and atomistic simulations of atomic friction with silicon oxide tips sliding on Au(111) are conducted at overlapping speeds. Experimental data unambiguously reveal a stic...

Clinical Trials [1050 Associated Clinical Trials listed on BioPortfolio]

Assessing Renal Function in Patients With an Antibiotic Laden Spacer

The purpose of this study is to monitor the renal function of patients who have an antibiotic laden spacer in place to treat an infected hip or knee arthroplasty.

Characterizing and Comparing the Profile of Microorganisms From Specific Body Sites and Environmental Surfaces in Newly Disinfected Patient Rooms

Overall Aim: To describe and to assess the change in the temporal profile and transmission of microorganisms between patients and environmental surfaces after admission into a newly disinf...

Usage of Acyclovir for Suppression of HIV-1 and HSV-2 Coinfected Persons in Cameroon

The study proposed that both clinical and subclinical HSV reactivation is associated with increased HIV shedding from mucosal surfaces, which may increase the infectiousness of HIV-1/HSV-2...

High-Flow Oxygen for Exertional Dyspnea

The goal of this clinical research study is to learn if high-flow oxygen, low-flow oxygen, high-flow air, or low-flow air, when given during structured exercise sessions, can help reduce d...

Virus Shedding and Environmental Deposition of a Novel Influenza Virus

An influenza pandemic has recently been declared, involving the novel A(H1N1) 'swine flu' virus. This has spread to almost 100 countries worldwide in less than two months, causing widespre...

Medical and Biotech [MESH] Definitions

A replica technique in which cells are frozen to a very low temperature and cracked with a knife blade to expose the interior surfaces of the cells or cell membranes. The cracked cell surfaces are then freeze-dried to expose their constituents. The surfaces are now ready for shadowing to be viewed using an electron microscope. This method differs from freeze-fracturing in that no cryoprotectant is used and, thus, allows for the sublimation of water during the freeze-drying process to etch the surfaces.

A procedure to increase the flow of blood to the MYOCARDIUM by creating transmural channels in the heart wall via the application of laser pulses to epicardial or endocardial surfaces.

The amount of PLASMA that perfuses the KIDNEYS per unit time, approximately 10% greater than effective renal plasma flow (RENAL PLASMA FLOW, EFFECTIVE). It should be differentiated from the RENAL BLOOD FLOW; (RBF), which refers to the total volume of BLOOD flowing through the renal vasculature, while the renal plasma flow refers to the rate of plasma flow (RPF).

The study of the deformation and flow of matter, usually liquids or fluids, and of the plastic flow of solids. The concept covers consistency, dilatancy, liquefaction, resistance to flow, shearing, thixotrophy, and VISCOSITY.

Ultrasonography applying the Doppler effect, with the superposition of flow information as colors on a gray scale in a real-time image. This type of ultrasonography is well-suited to identifying the location of high-velocity flow (such as in a stenosis) or of mapping the extent of flow in a certain region.

Search BioPortfolio:
Loading
Advertisement
Advertisement

Searches Linking to this Article