Thermal effects in dynamics of interfaces
نویسنده
چکیده
Dynamical Ginzburg–Landau theory is applied to the study of thermal effects of motion of interfaces that appear after different phase transitions. These effects stem from the existence of the surface thermodynamic properties and temperature gradients in the interfacial transition region. Thermal effects may be explained by the introduction of a new thermodynamic force exerted on the interface, called here Gibbs–Duhem force, and the internal energy density flux through the interface. The evolution equations for the interfacial motion are derived. For the experimental verification of the thermal effects during continuous ordering the expression is derived for the amplitude of temperature waves. © 2002 American Institute of Physics. @DOI: 10.1063/1.1448485#
منابع مشابه
Molecular dynamics simulation of a binary mixture lubricant for use in hard disk interfaces
In Hard Disk Drives (HDD), it is necessary to decrease the Flying Height (FH) between the head and the disk (currently, FH is around 3-5 nm) so as to increase recording densities. Retaining the solid lubricant has become a difficult proposition owing to intermittent contact between the surfaces. ZTMD and Z are used as solid lubricant to lubricate these interfaces. In this paper, the behavior of...
متن کاملThermal conductivity calculation of magnetite using molecular dynamics simulation
In the current research, thermal conductivity of magnetite (Fe3O4) has been calculated using molecular dynamic simulation. The rNEMD Molecular Dynamics Method provided in the LMMPS package is used for the simulation of the thermal conductivity. The effects of magnetite layer size and temperature on the thermal conductivity have been investigated. The numerical results have...
متن کاملEffects of temperature and disorder on thermal boundary conductance at solid–solid interfaces: Nonequilibrium molecular dynamics simulations
Thermal transport across interfaces is becoming increasingly important with the advent of nanostructures and nanocomposite materials. A nonequilibrium molecular dynamics (NEMD) approach is developed to investigate thermal transport across solid–solid interfaces. Thermal boundary conductance is calculated for a range of mismatched interfaces and compared to the diffuse mismatch model (DMM). The ...
متن کاملبهبود بازده تبدیل انرژی حالت جامد با استفاده از نانوساختارهای ترموالکتریک
Solid-state energy conversion technologies such as thermoelectric refrigeration and power generation require materials with low thermal conductivity yet high electrical conductivity and Seebeck coefficiency. Although semiconductors are the best thermoelectric materials, they rarely have the such features. Nanostructures such as superlattices, quantum wires, and quantum dots provide novel method...
متن کاملNumerical study of thermal dynamics of gold nanoparticles in laser-induced hyperthermia therapy
Damage of the normal tissue is a serious concenrn in cancer treatment. Hyperthermia by laserhas been considered as a safe cancer treatments methods with lower harmful effects on normaltissues. Using nanoparticles in cancer treatment has improved laser therapy, which is based ona selective cell targeting method to localize cell damages. Metallic nanoparticles such as gold,silver, and copper have...
متن کاملInvestigation into the Effects of Nanoparticle Size and Channel Depth on the Thermophysical Properties of Water Nanofluids in the Nanochannel Using Molecular Dynamics Simulation
In this research, an in-house code which uses the molecular dynamics method to study the flow of different nanofluids in the copper nanochannel and computes the thermo-physicals properties has been developed. The flow of nanofluids has been studied from hydro-thermally viewpoint and temperature jump at the wall has been applied. Parametric study to consider the effect of different parametric su...
متن کامل