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

Typical Model Studies01:30

Typical Model Studies

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the streamlines...
Turbulent Flow01:24

Turbulent Flow

Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent spots,...
Rapidly Varying Flow01:24

Rapidly Varying Flow

Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
Modeling and Similitude01:12

Modeling and Similitude

Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
Poiseuille's Law and Reynolds Number01:10

Poiseuille's Law and Reynolds Number

Any fluid in a horizontal tube can flow due to pressure differences—fluid flows from high to low pressure. The flow rate (Q) is the ratio of pressure difference and resistance through a horizontal tube. The greater the pressure difference, the higher the flow rate. The flow resistance is expressed as:

You might also read

Related Articles

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

Sort by
Same author

miR-548t-3p impairs nuclear mechanosensitivity and focal adhesion via lamin A/C downregulation.

Biophysical journal·2025
Same author

Multiblock High Order Large Eddy Simulation of Powered Fontan Hemodynamics: Towards Computational Surgery.

Computers & fluids·2017
Same author

Dynamic Mode Decomposition of Fontan Hemodynamics in an Idealized Total Cavopulmonary Connection.

Fluid dynamics research·2014
Same author

Large eddy simulation of transitional flow in an idealized stenotic blood vessel: evaluation of subgrid scale models.

Journal of biomechanical engineering·2014
Same author

Flow over a membrane-covered, fluid-filled cavity.

Computers & structures·2014
Same author

Assessment of stretched vortex subgrid-scale models for LES of incompressible inhomogeneous turbulent flow.

International journal for numerical methods in fluids·2013
Same journal

Interaction of near-wall bubble arrays with acoustic waves induced by an oscillating rigid wall.

The Journal of the Acoustical Society of America·2026
Same journal

Ultra-broadband underwater acoustic projector based on transverse resonance orthogonal beam (TROB) mode and acoustic matching layer technique.

The Journal of the Acoustical Society of America·2026
Same journal

Fine-scale quantitative analysis of bowhead whale (Balaena mysticetus) song shows varying stability of song types.

The Journal of the Acoustical Society of America·2026
Same journal

High-resolution depth estimation for multiple wideband sources in deep sea via sparse Bayesian learninga).

The Journal of the Acoustical Society of America·2026
Same journal

Depression markers in speech: An approach based on tract variables dynamics.

The Journal of the Acoustical Society of America·2026
Same journal

The oyster toadfish (Opsanus tau) alters active and diurnal calling amid vessel noise in New York City.

The Journal of the Acoustical Society of America·2026
See all related articles

Related Experiment Video

Updated: Jul 6, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

Comparing turbulence models for flow through a rigid glottal model.

Jungsoo Suh1, Steven H Frankel

  • 1Maurice J. Zucrow Laboratories, School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907-2014, USA.

The Journal of the Acoustical Society of America
|March 19, 2008
PubMed
Summary
This summary is machine-generated.

This study modeled human vocal tract airflow using computational fluid dynamics. Unsteady k-omega shear stress transport simulations accurately predicted glottal jet skewing and pressure distribution, outperforming other turbulence models.

More Related Videos

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
10:16

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
10:13

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Published on: November 25, 2017

Related Experiment Videos

Last Updated: Jul 6, 2026

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
09:58

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp

Published on: February 3, 2014

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication
10:16

Synthetic, Multi-Layer, Self-Oscillating Vocal Fold Model Fabrication

Published on: December 2, 2011

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
10:13

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions

Published on: November 25, 2017

Area of Science:

  • Fluid Dynamics
  • Bioacoustics
  • Computational Mechanics

Background:

  • Accurate modeling of airflow in the human vocal tract is crucial for understanding speech production.
  • Previous studies have used various computational fluid dynamics (CFD) approaches to simulate vocal tract aerodynamics.
  • Identifying precise turbulence models for capturing complex glottal flow features remains an ongoing challenge.

Purpose of the Study:

  • To evaluate the efficacy of different turbulence models in CFD simulations of human vocal tract flow.
  • To compare the predictive capabilities of various models against experimental and large eddy simulation data.
  • To determine the optimal turbulence model for simulating glottal jet skewing and intraglottal pressure dynamics.

Main Methods:

  • Numerical modeling of airflow through a rigid human vocal tract model with a divergent glottis.
  • Application of the Reynolds-averaged Navier-Stokes (RANS) approach.
  • Testing of multiple turbulence models within a commercial CFD code, including k-omega shear stress transport and Spalart-Allmaras models.

Main Results:

  • Unsteady simulations using the k-omega shear stress transport (SST) model demonstrated superior agreement with prior measurements and predictions.
  • The k-omega SST model effectively captured glottal jet skewing caused by the Coanda effect.
  • This model also provided more accurate predictions of intraglottal pressure distribution and skin friction coefficients compared to other investigated models.

Conclusions:

  • The k-omega SST turbulence model is highly effective for simulating complex aerodynamic phenomena in the human vocal tract.
  • Unsteady RANS simulations with k-omega SST offer improved accuracy for predicting glottal flow dynamics.
  • This research provides valuable insights for refining computational models of speech production.