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Related Concept Videos

Temperature Dependent Deformation01:12

Temperature Dependent Deformation

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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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Temperature Dependence on Reaction Rate02:55

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The Collision Theory
Atoms, molecules, or ions must collide before they can react with each other. Atoms must be close together to form chemical bonds. This premise is the basis for a theory that explains many observations regarding chemical kinetics, including factors affecting reaction rates.
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Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
The concept of temperature has evolved from the common concepts of hot and cold. The scientific definition of temperature explains more than just our sense of hot and cold. Temperature is operationally defined as the quantity measured with a thermometer. Furthermore, temperature is...
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Derivatives: Problem Solving01:26

Derivatives: Problem Solving

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Temperature-Dependent Growth of Brook TroutThe growth of brook trout is closely influenced by water temperature. Experimental data demonstrate how trout weight changes over a 24-day period in response to varying water temperatures. At lower temperatures, such as 15.5 degrees Celsius, brook trout show significant weight gain. However, as the temperature increases, the amount of weight gained steadily decreases. At the highest temperature measured, 24.4 degrees Celsius, trout experience a net...
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Dynamic Equilibrium

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A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
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An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
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The Modern Temperature-Accelerated Dynamics Approach.

Richard J Zamora1, Blas P Uberuaga2, Danny Perez1

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545;

Annual Review of Chemical and Biomolecular Engineering
|March 17, 2016
PubMed
Summary
This summary is machine-generated.

Temperature-accelerated dynamics (TAD) enhances simulations of slow molecular processes by temporarily increasing system temperature. Recent advancements, including speculatively parallel TAD, improve computational efficiency for materials science applications.

Keywords:
accelerated molecular dynamicsinfrequent eventsmolecular dynamicsrare eventstemperature-accelerated dynamics

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Area of Science:

  • Computational chemistry and materials science
  • Atomistic simulations
  • Molecular dynamics

Background:

  • Accelerated molecular dynamics (AMD) methods simulate systems where state-to-state evolution is slow.
  • Temperature-accelerated dynamics (TAD) is an efficient AMD technique that temporarily raises system temperature to speed up simulations.
  • TAD has revealed complex material behaviors not observable with direct molecular dynamics (MD).

Purpose of the Study:

  • To review the advancements in the Temperature-accelerated dynamics (TAD) method.
  • To introduce the latest development in TAD: speculatively parallel TAD.
  • To highlight the impact of parallel programming on TAD's spatial and temporal scaling.

Main Methods:

  • Review of existing Temperature-accelerated dynamics (TAD) algorithms and their enhancements.
  • Analysis of parallel programming techniques applied to TAD.
  • Introduction of the speculatively parallel TAD algorithm.

Main Results:

  • TAD has proven effective in studying diverse materials applications.
  • Algorithmic enhancements and mathematical framework analysis have improved TAD performance.
  • Parallel programming techniques have significantly boosted TAD's spatial and temporal scaling.

Conclusions:

  • Modern TAD methods, especially speculatively parallel TAD, offer enhanced efficiency for atomistic simulations.
  • Continued development of TAD is crucial for exploring complex material behaviors.
  • Speculatively parallel TAD represents a significant step forward in accelerating molecular dynamics simulations.