Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

612
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...
612
Navier–Stokes Equations01:28

Navier–Stokes Equations

1.1K
For incompressible Newtonian fluids, where density remains constant, stresses show a linear relationship with the deformation rate, defined by normal and shear stresses. Normal stresses depend on the pressure exerted on the fluid and the rate of deformation in specific directions, which determines how fluid flows under varying pressures. Shear stresses, on the other hand, act tangentially across fluid layers. They explain how adjacent fluid layers slide relative to one another, connecting...
1.1K
Stokes' Law01:20

Stokes' Law

2.1K
Viscous forces, like friction, are intermolecular forces that resist the relative motion of molecules over each other. When a solid body moves through a liquid, viscous forces drag it in the opposite direction. The force's magnitude depends on the solid's shape and size, as well as its speed and the liquid's coefficient of viscosity, density and temperature.
The expression for the force on a solid spherical object in a fluid is called Stokes' law. Stokes' law is valid only...
2.1K
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

509
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.
509
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

593
Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...
593
Plane Potential Flows01:23

Plane Potential Flows

540
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
540

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Parallelized contactless microfluidic dispenser with superhydrophobic nozzles for scalable combinatorial screening.

Biomicrofluidics·2026
Same author

Electrical Conductivity of Copper-Graphene (Cu-Gr) Composites: The Underlying Mechanisms of Ultrahigh Conductivity.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

A tracking algorithm for finite-size particles.

Biomicrofluidics·2025
Same author

Investigation of pressure balance in proximity of sidewalls in deterministic lateral displacement.

Biomicrofluidics·2025
Same author

A universal framework for design and manufacture of deterministic lateral displacement chips.

Lab on a chip·2025
Same author

Additively manufactured, long, serpentine submillimeter channels by combining binder jet printing and liquid-phase sintering.

Scientific reports·2024

Related Experiment Video

Updated: Nov 5, 2025

The Diffusion of Passive Tracers in Laminar Shear Flow
08:01

The Diffusion of Passive Tracers in Laminar Shear Flow

Published on: May 1, 2018

8.8K

A passive Stokes flow rectifier for Newtonian fluids.

Aryan Mehboudi1, Junghoon Yeom2

  • 1Department of Mechanical Engineering, The University of Texas, Austin, TX, 78758, USA.

Scientific Reports
|May 14, 2021
PubMed
Summary

Passive flow rectification for Newtonian fluids is achieved in the Stokes regime by introducing nonlinearity via deformable microchannels. This enables directional flow control in microfluidic devices for both liquid and gas flows.

More Related Videos

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

11.8K
Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
08:32

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

2.6K

Related Experiment Videos

Last Updated: Nov 5, 2025

The Diffusion of Passive Tracers in Laminar Shear Flow
08:01

The Diffusion of Passive Tracers in Laminar Shear Flow

Published on: May 1, 2018

8.8K
Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
11:00

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

Published on: July 19, 2016

11.8K
Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels
08:32

Assembly and Characterization of an External Driver for the Generation of Sub-Kilohertz Oscillatory Flow in Microchannels

Published on: January 28, 2022

2.6K

Area of Science:

  • Fluid mechanics
  • Microfluidics
  • Non-linear dynamics

Background:

  • Non-linear effects are absent in the Stokes regime, preventing flow rectification in Newtonian fluids.
  • Traditional methods for flow rectification often require active control or complex geometries.

Purpose of the Study:

  • To demonstrate passive flow rectification for Newtonian fluids within the Stokes regime.
  • To introduce nonlinearity into linear Stokes equations using microchannel geometry and fluid-solid interaction.
  • To extend the rectification mechanism to compressible gas flows.

Main Methods:

  • Modeling non-linear coupled fluid-solid mechanics in shallow microchannels with deformable ceilings.
  • Fabricating ultra-low aspect ratio microchannels with flexible membranes.
  • Experimentally validating flow rectification for low-Reynolds-number flows (0.001 < Re < 10) of water, methanol, and isopropyl alcohol.
  • Extending the model to analyze rectification in compressible gas flows.

Main Results:

  • Asymmetric flow resistances were generated due to unequal ceiling deflection based on flow direction.
  • A larger flow rate was achieved in the nozzle configuration compared to the diffuser configuration.
  • Passive flow rectification was demonstrated for Newtonian liquids and compressible gas flows.
  • Maximum experimental rectification ratio of 1.41 was achieved, with a potential for 1.76 through optimization.

Conclusions:

  • Passive flow rectification is achievable in the Stokes regime for Newtonian fluids by incorporating non-linearity through fluid-solid interactions in microchannels.
  • The proposed mechanism offers a novel approach for directional flow control in microfluidic applications.
  • This study presents the first demonstration of rectifying equilibrium gas flows under Stokes flow conditions.