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

682
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.
682
Design Example: Creating a Hydraulic Model of a Dam Spillway01:21

Design Example: Creating a Hydraulic Model of a Dam Spillway

891
Scaled hydraulic models of dam spillways provide a practical way to replicate and study the intricate flow dynamics of these structures. Often built to a 1:15 ratio, these models allow for observing critical water behavior, such as velocity distribution, flow patterns, and energy dissipation.
891
Rapidly Varying Flow01:24

Rapidly Varying Flow

637
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...
637
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

1.4K
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,...
1.4K
Bioreactor Design and Operational System01:29

Bioreactor Design and Operational System

66
Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
66
Bernoulli's Equation for Flow Along a Streamline01:30

Bernoulli's Equation for Flow Along a Streamline

1.7K
Bernoulli's equation relates the energy conservation in a fluid moving along a streamline. The equation applies to incompressible and inviscid fluids under steady flow. For such a flow, Newton's second law is applied to a small fluid element, which experiences forces due to pressure differences, gravity, and velocity variations. The force balance leads to the following form of Bernoulli's equation:
1.7K

You might also read

Related Articles

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

Sort by
Same author

Early Lung Cancer Detection via AI-Enhanced CT Image Processing Software.

Diagnostics (Basel, Switzerland)·2025
Same author

High-Energy Milling as a Pre-Treatment Alternative for Lignocellulosic Fibers Derived from Brewer's Spent Grain.

Polymers·2025
Same author

Lossless Medical Image Compression by Using Difference Transform.

Entropy (Basel, Switzerland)·2022
Same author

Implications of electric potentials applied on a denitrifying process.

Environmental technology·2018
Same author

Inhibitory effects of quinoid redox mediators on a denitrifying culture.

Environmental technology·2018

Related Experiment Video

Updated: Mar 29, 2026

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
11:14

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

Published on: January 10, 2017

12.3K

CFD Modelling Validated by PIV of Hydrodynamics in a Raceway Bioreactor: Dead Zone Detection and Flow Field Analysis.

Luis Alberto Zamora-Campos1, Daniel Eduardo Rivera-Arreola1, Rafael Rojas-Hernández2

  • 1Departamento de Posgrado, Universidad Politécnica de Pachuca, Zempoala 43830, Hidalgo, Mexico.

Bioengineering (Basel, Switzerland)
|March 28, 2026
PubMed
Summary

A validated computational fluid dynamics (CFD) model accurately simulates microalgal raceway bioreactor hydrodynamics. This validated model can optimize bioreactor design for improved flow and efficiency in microalgal production.

Keywords:
CFD modelabiotic mediumexperimental validationraceway bioreactor

More Related Videos

In Vitro Model Integrating Substrate Stiffness and Flow to Study Endothelial Cell Responses
08:53

In Vitro Model Integrating Substrate Stiffness and Flow to Study Endothelial Cell Responses

Published on: July 19, 2024

986
A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
08:13

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

18.0K

Related Experiment Videos

Last Updated: Mar 29, 2026

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level
11:14

A Microfluidic System with Surface Patterning for Investigating Cavitation Bubble(s)–Cell Interaction and the Resultant Bioeffects at the Single-cell Level

Published on: January 10, 2017

12.3K
In Vitro Model Integrating Substrate Stiffness and Flow to Study Endothelial Cell Responses
08:53

In Vitro Model Integrating Substrate Stiffness and Flow to Study Endothelial Cell Responses

Published on: July 19, 2024

986
A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
08:13

A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities

Published on: December 25, 2015

18.0K

Area of Science:

  • Biotechnology
  • Fluid Dynamics
  • Chemical Engineering

Background:

  • Raceway bioreactors are cost-effective for microalgal production but lack validated hydrodynamic models.
  • Understanding fluid dynamics is crucial for optimizing microalgal cultivation.

Purpose of the Study:

  • To develop and experimentally validate a computational fluid dynamics (CFD) model for a laboratory-scale raceway bioreactor.
  • To analyze flow patterns and identify areas for hydrodynamic improvement.

Main Methods:

  • A multiphase CFD model was developed using ANSYS Fluent with the RNG k-ε turbulence model.
  • Particle Image Velocimetry (PIV) was used for experimental validation at various paddlewheel speeds.
  • CFD predictions were compared against PIV data to assess accuracy.

Main Results:

  • The CFD model accurately predicted flow fields, with a mean relative error below 8% compared to experimental data.
  • Low-velocity zones were observed to form and dissipate based on agitation intensity.
  • Flow homogeneity can be improved by relocating the paddlewheel without increasing energy consumption.

Conclusions:

  • The validated CFD model offers a reliable tool for enhancing raceway bioreactor design and operation.
  • This study provides a foundation for future research into more efficient microalgal production technologies.
  • Optimizing hydrodynamics is key to improving the sustainability of microalgal cultivation.