Related Experiment Video
Updated: Jul 19, 2026
10:52
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Multiscale modeling of liquids with molecular specificity
G De Fabritiis1, R Delgado-Buscalioni, P V Coveney
1Centre for Computational Science, Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, United Kingdom. g.defabritiis@ucl.ac.uk
Physical Review Letters
|October 10, 2006
Summary
This study introduces a hybrid multiscale simulation method, coupling molecular dynamics with fluctuating hydrodynamics. This approach accurately models mesoscale phenomena by retaining molecular detail where needed and coarse-graining elsewhere.
Area of Science:
- Computational physics
- Multiscale modeling
- Fluid dynamics
Background:
- Simulating mesoscale phenomena is limited by the disparity between molecular and mesoscopic scales.
- Existing methods struggle to bridge these diverse length and time scales efficiently.
Purpose of the Study:
- To develop a hybrid multiscale computational technique for simulating mesoscale phenomena.
- To overcome the limitations of traditional molecular simulations in capturing mesoscopic behavior.
Main Methods:
- Coupling molecular dynamics (MD) with a mesoscopic description based on Landau's fluctuating hydrodynamics.
- Implementing a hybrid approach that retains full molecular detail in critical regions and coarse-grains in others.
Main Results:
- The hybrid scheme correctly couples hydrodynamics at different scales.
- Fluctuations are thermodynamically consistent at both molecular and continuum levels.
- Simulations of sound waves in water and their reflection by a lipid monolayer demonstrate the method's efficacy.
Conclusions:
- The developed hybrid multiscale technique effectively bridges molecular and mesoscopic scales.
- This method offers a thermodynamically consistent way to simulate complex fluid phenomena.
- It provides a powerful tool for studying mesoscale physics in realistic systems.
Related Concept Videos
01:34Fluid Mosaic Model
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.LipidsThe most...
01:19Fluid Mosaic Model
Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich with the analogy of...
01:12Modeling 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...
01:30Typical 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.
02:26Molecular Comparison of Gases, Liquids, and Solids
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
02:00Molecular Models
Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.