Related Experiment Video
Updated: May 10, 2026
08:42
Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes
Published on: April 10, 2017
Dependence between velocity slip and temperature jump in shear flows.
Jie Sun1, Wen Wang, Hua Sheng Wang
1School of Engineering and Materials Science, Queen Mary, University of London, London E1 4NS, United Kingdom. j.sun@qmul.ac.uk
The Journal of Chemical Physics
|June 28, 2013
Summary
This study reveals distinct nano-confined liquid behaviors based on solid-liquid bonding strength. Weak interactions allow free slip, while strong interactions cause molecular ordering and restricted slip.
Area of Science:
- Interfacial phenomena
- Fluid dynamics at the nanoscale
- Solid-liquid interactions
Background:
- Understanding nanoscale fluid behavior is crucial for microfluidics and advanced materials.
- Interfacial properties like velocity slip and temperature jump significantly impact fluid flow.
- Solid-liquid bonding strength is a key parameter influencing these interfacial phenomena.
Purpose of the Study:
- To investigate how solid-liquid bonding strength and shear rate affect coupled velocity slip and temperature jump.
- To differentiate interfacial behaviors in weak versus strong solid-liquid interaction regimes.
- To analyze the relationship between slip length and Kapitza length under varying conditions.
Main Methods:
- Simulations of shear flows with nano-confined liquids.
- Analysis of interfacial properties: slip length and Kapitza length.
- Identification of interaction regimes based on a bonding strength parameter (β).
Main Results:
- Distinct interfacial behaviors observed in weak (β < 2) and strong (β > 2) interaction regimes.
- In weak regime: monotonic slip and Kapitza length variations; temperature jump increases with velocity slip.
- In strong regime: multivalued slip length; Kapitza length is insensitive; non-monotonic temperature jump variation.
Conclusions:
- Solid-liquid bonding strength fundamentally alters nanoscale fluid interfacial dynamics.
- The relationship between velocity slip and temperature jump is regime-dependent.
- Kapitza length exhibits different dependencies on slip length in weak versus strong interaction regimes.
More Related Videos
10:52Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
Published on: August 7, 2018
11:51Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Related Concept Videos
01:22Couette Flow
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
01:18Newtonian Fluid: Problem Solving
Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
01:17Viscosity
When water is poured into a glass, it falls freely and quickly, whereas if honey or maple syrup is poured over a pancake, it flows slowly and sticks to the surface of the container. This difference in the flow of different kinds of liquids arises due to the fluid friction between the liquid layers and the liquid and the surrounding material. This property of fluids is called fluid viscosity. In this example, water has a lower viscosity than honey and maple syrup.
The SI unit of viscosity is...
The SI unit of viscosity is...
01:27Viscosity
Viscosity is a property of fluids that measures their resistance to flow. It is influenced by factors such as the surface area of contact, the gradient of flow speed, and the fluid's viscosity constant, called the coefficient of viscosity. The coefficient of viscosity, also known as dynamic viscosity, is denoted by the symbol η. It determines the proportionality between the viscous force and the gradient of flow speed.Newton's law of viscosity states that the viscous force on a faster-moving...
01:17Steady, Laminar Flow Between Parallel Plates
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
01:23Relation Between the Distributed Load and Shear
Understanding the relationship between the distributed load and shear force in structural analysis is crucial for analyzing beams subjected to various loading conditions. Consider the case of a beam experiencing a distributed load, two concentrated loads, and a couple moment.