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Steady, Laminar Flow Between Parallel Plates01:17

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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.
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Related Experiment Video

Updated: Mar 6, 2026

Evolution of Staircase Structures in Diffusive Convection
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Quantifying the dynamic density driven convection in high permeability packed beds.

Ying Teng1, Lanlan Jiang2, Yingting Fan1

  • 1Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116024 Dalian, China.

Magnetic Resonance Imaging
|March 19, 2017
PubMed
Summary
This summary is machine-generated.

Density-driven convection aids CO2 geological storage. Laboratory experiments visualized convective fingers and their growth rates, revealing key insights into mass transfer crucial for storage safety and capacity.

Keywords:
Density driven convectionFinger growth regimesMixing timeOnset timeRayleigh number

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Area of Science:

  • Geochemistry and Environmental Science
  • Fluid Dynamics and Transport Phenomena

Background:

  • Density-driven convection is vital for CO2 geological storage capacity and safety.
  • Understanding mass transfer mechanisms, particularly convective onset and development, is critical for large-scale CO2 storage.
  • Previous studies highlight the importance of fluid dynamics in subsurface CO2 sequestration.

Purpose of the Study:

  • To investigate density-driven convection in a laboratory setting using a vertical tube.
  • To analyze the transition from diffusion to convection and the formation of convective structures.
  • To quantify the effects of varying permeability and Rayleigh number on convective behavior.

Main Methods:

  • Laboratory experiments using deuterium oxide (D2O)/manganese chloride (MnCl2) solutions as analogs for CO2-rich brine.
  • Magnetic Resonance Imaging (MRI) technology with echo-multi-slice pulse sequence for clear interface visualization.
  • Systematic variation of permeability to study different characteristic Rayleigh numbers.

Main Results:

  • MRI intensity images clearly showed the transition from diffusion to convection.
  • Observed finger formation, propagation, coalescence, and multi-finger development in denser fluid pairs.
  • Quantified finger growth rates in three distinct periods: rising, stable, and declining, as functions of Rayleigh number.

Conclusions:

  • Density-driven convection plays a significant role in CO2 geological storage.
  • The study provides detailed insights into convective fingering dynamics, onset, and mixing times.
  • Findings are crucial for optimizing CO2 storage capacity and ensuring long-term safety.