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

Boundary Conditions: Lossless Lines01:21

Boundary Conditions: Lossless Lines

169
Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
At the receiving end, the boundary condition states that the voltage equals the product of the receiving-end impedance and current. This relationship is expressed as a function of the incident and...
169
Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

137
To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
137
Boundary Conditions for Current Density01:25

Boundary Conditions for Current Density

993
Current density becomes discontinuous across an interface of materials with different electrical conductivities. The normal component of the current density is continuous across the boundary.
993
Electrostatic Boundary Conditions01:16

Electrostatic Boundary Conditions

638
Consider an external electric field propagating through a homogeneous medium. When the electric field crosses the surface boundary of the medium, it undergoes a discontinuity. The electric field can be resolved into normal and tangential components. The amount by which the field changes at any boundary is given by the difference between the field components above and below the surface boundary.
The surface integral of an electric field is given by Gauss's law in integral form and is related to...
638
Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

187
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
187
Navier–Stokes Equations01:28

Navier–Stokes Equations

881
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...
881

You might also read

Related Articles

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

Sort by
Same author

Flow and mass transfer characteristics for interacting side-by-side cylinders.

Physics of fluids (Woodbury, N.Y. : 1994)·2022
Same journal

HeartSimSage: Attention-Enhanced Graph Neural Networks for Accelerating Cardiac Mechanics Modeling.

Journal of computational physics·2026
Same journal

Composite B-spline regularized delta functions for the immersed boundary method: Divergence-free interpolation and gradient-preserving force spreading.

Journal of computational physics·2026
Same journal

Improving the robustness of the immersed interface method through regularized velocity reconstruction.

Journal of computational physics·2025
Same journal

Laplacian Eigenfunction-Based Neural Operator for Learning Nonlinear Reaction-Diffusion Dynamics.

Journal of computational physics·2025
Same journal

An efficient adaptive algorithm for photon-electron coupled Boltzmann equation in radiation therapy.

Journal of computational physics·2025
Same journal

On generalizing the induced surface charge method to heterogeneous Poisson-Boltzmann models for electrostatic free energy calculation.

Journal of computational physics·2025
See all related articles

Related Experiment Video

Updated: Oct 1, 2025

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
10:12

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

9.1K

A novel interpolation-free sharp-interface immersed boundary method.

Kamau Kingora1, Hamid Sadat-Hosseini1

  • 1Department of Mechanical Engineering, University of North Texas, Denton, Texas.

Journal of Computational Physics
|March 7, 2022
PubMed
Summary
This summary is machine-generated.

A new immersed boundary (IB) method accurately simulates incompressible flows with complex shapes. This direct forcing technique avoids interpolation errors, achieving high accuracy for various IB types, including zero-thickness ones.

Keywords:
CFDImmersed boundarydirect forcinginterpolation freesharp interface

More Related Videos

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
08:49

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

Published on: February 17, 2019

6.6K
Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
13:07

Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression

Published on: January 15, 2022

4.1K

Related Experiment Videos

Last Updated: Oct 1, 2025

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique
10:12

Analyzing Mixing Inhomogeneity in a Microfluidic Device by Microscale Schlieren Technique

Published on: June 12, 2015

9.1K
Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions
08:49

Impacts of Free-falling Spheres on a Deep Liquid Pool with Altered Fluid and Impactor Surface Conditions

Published on: February 17, 2019

6.6K
Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
13:07

Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression

Published on: January 15, 2022

4.1K

Area of Science:

  • Computational fluid dynamics
  • Numerical methods for fluid flow

Background:

  • Simulating incompressible flows with complex geometries is challenging.
  • Existing immersed boundary (IB) methods often suffer from inaccuracies due to interpolation and stair-step approximations.

Purpose of the Study:

  • To introduce a novel 2nd order direct forcing immersed boundary method.
  • To enhance accuracy and stability for simulating incompressible flows with complex IBs.

Main Methods:

  • A direct forcing immersed boundary (IB) method with cell reshaping to conform to IB geometry.
  • Modeling IBs as continuous 2D planes in 3D space, mimicking conformal grids.
  • Enforcing boundary conditions directly at the IB location without interpolation.

Main Results:

  • Elimination of spatial pressure oscillations and the stair-step problem.
  • Accurate resolution of boundary layers and sound simulations on high aspect ratio grids.
  • Successful simulation of flows with multiple, closely-packed, stationary, moving, and zero-thickness IBs.

Conclusions:

  • The proposed IB method demonstrates high accuracy and robustness for diverse flow problems.
  • Results show excellent agreement with theoretical models and experimental data (<1% deviation).
  • The method offers a powerful tool for simulating complex fluid dynamics with immersed boundaries.