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Related Concept Videos

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In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added...
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As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
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Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
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When a rod is made of different materials or has various cross-sections, it must be divided into parts that meet the necessary conditions for determining the deformation. These parts are each characterized by their internal force, cross-sectional area, length, and modulus of elasticity. These parameters are then used to compute the deformation of the entire rod.
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A coupled continuum-statistical model to predict interfacial deformation under an external field.

Joydip Chaudhuri1, Dipankar Bandyopadhyay2

  • 1Department of Chemical Engineering, Indian Institute of Technology Guwahati, 781039 Assam, India.

Journal of Colloid and Interface Science
|November 27, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a thermodynamic model to analyze interfacial tension and deformation under external fields. Field exposure effects on molecular behavior accurately predict interfacial changes, aligning with experimental data.

Keywords:
Analytical modelCFDExternal fieldInterfacial tensionTwo-phase flows

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Area of Science:

  • Thermodynamics
  • Fluid Dynamics
  • Materials Science

Background:

  • Understanding interfacial phenomena is crucial in fluid dynamics and materials science.
  • External fields can significantly alter fluid interfaces, impacting material properties and processes.

Purpose of the Study:

  • To develop a generic thermodynamic model coupling continuum and statistical approaches.
  • To theoretically analyze variations in interfacial tension and fluid interface deformation under field exposure.
  • To express local interfacial tension variations as functions of molecular interaction potentials under applied fields.

Main Methods:

  • Developed two continuum-statistical models for interfacial tension using different molecular interaction potentials.
  • Integrated analytical models with Cahn-Hilliard and Navier-Stokes frameworks.
  • Employed numerical simulations using computational tools for analysis.

Main Results:

  • Correlated field exposure effects on molecular redistribution and potentials with interfacial tension variations and deformations.
  • Validated temperature dependence of interfacial thickness and tension against experimental data.
  • Achieved accurate prediction of interfacial deformation under electric, magnetic, and optical fields, matching existing results.

Conclusions:

  • The developed thermodynamic model accurately predicts interfacial behavior under external fields.
  • Field-induced molecular changes are key drivers of interfacial tension and deformation.
  • The model shows strong agreement with experimental and theoretical findings, offering a robust framework for further research.