Multicomponent Energy Conserving Dissipative Particle Dynamics: A General Framework for Mesoscopic Heat Transfer Applications

2008 ◽  
Author(s):  
Anuj Chaudhri ◽  
Jennifer R. Lukes
Keyword(s):  
Dissipative Particle Dynamics ◽  
Multicomponent System ◽  
Particle Dynamics ◽  
Two Dimensions ◽  
Scaling Factors ◽  
Dimensionless Groups ◽  
Energy Conserving ◽  
Steady State Heat ◽  
New Framework ◽  
Transient And Steady State

The energy conserving formulation of the Dissipative Particle Dynamics (DPD) mesoscale method for multicomponent systems is analyzed thoroughly. A new framework is established by identifying the dimensionless groups using general scaling factors. When the scaling factors are chosen based on the solvent in a multicomponent system, the reduced system of equations can easily be solved computationally. Simulation results are presented for one dimensional transient and steady-state heat conduction in a random DPD solid, which compare well with existing published and analytical solutions. This model is extended to two dimensions and shows excellent agreement with the analytical solution.

Multicomponent Energy Conserving Dissipative Particle Dynamics: A General Framework for Mesoscopic Heat Transfer Applications

2009 ◽  
Vol 131 (3) ◽  
Author(s):  
Anuj Chaudhri ◽  
Jennifer R. Lukes
Keyword(s):  
Heat Transfer ◽  
Dissipative Particle Dynamics ◽  
Multicomponent System ◽  
Computer Code ◽  
Particle Dynamics ◽  
Two Dimensions ◽  
Scaling Factors ◽  
Energy Conserving ◽  
Steady State Heat ◽  
First Time

A multicomponent framework for energy conserving dissipative particle dynamics (DPD) is presented for the first time in both dimensional and dimensionless forms. Explicit definitions for unknown scaling factors that are consistent with DPD convention are found by comparing the present, general dimensionless governing equations to the standard DPD expressions in the literature. When the scaling factors are chosen based on the solvent in a multicomponent system, the system of equations reduces to a set that is easy to handle computationally. A computer code based on this multicomponent framework was validated, under the special case of identical components, for one-dimensional transient and one- and two-dimensional steady-state heat conduction in a random DPD solid. The results, which compare well with existing DPD works and with analytical solutions in one and two dimensions, show the promise of energy conserving DPD for modeling heat transfer at mesoscopic length scales.

Mesoscale Modeling of Non-Isothermal Fluid Displacement in Capillary Tube Using Dissipative Particle Dynamics

2013 ◽  
Author(s):  
M. S. Zaman ◽  
M. G. Satish
Keyword(s):  
Enhanced Recovery ◽  
Capillary Tube ◽  
Dissipative Particle Dynamics ◽  
Flow Simulation ◽  
Computer Code ◽  
Particle Dynamics ◽  
Mesoscale Modeling ◽  
Fluid Displacement ◽  
Energy Conserving ◽  
Isothermal Fluid

It is crucial to understand how one fluid is displaced by another at different temperature through a capillary, as many industrial and reservoir enhanced recovery methods fall into this category. Dissipative particle dynamics (DPD) method has been successfully applied to model mesoscale behaviors of many processes. In this paper, DPD method with energy conservation has been applied to model non-isothermal fluid displacement in capillary tube. Validation of the in-house computer code written in C# is carried out by modeling isothermal no-slip fluid flow. Simulation of non-isothermal fluid displacement using energy conserving DPD gives insight about the parameters affecting the flow.

Liquid Characteristics Under Melting/Solidification Conditions Using Energy Conserving Dissipative Particle Dynamics

2014 ◽  
Author(s):  
Erik Johansson ◽  
Toru Yamada ◽  
Jinliang Yuan ◽  
Bengt Sundén ◽  
Yutaka Asako ◽  
...  
Keyword(s):  
Moving Boundary ◽  
Flow Direction ◽  
Dissipative Particle Dynamics ◽  
Thermal Characteristics ◽  
Particle Dynamics ◽  
One Dimensional ◽  
Liquid Moving ◽  
Energy Conserving ◽  
Solid Liquid ◽  
Change Problem

In this paper, energy conserving Dissipative Particle Dynamics (DPDe) is used to study liquid characteristics when the walls are kept at a melting temperature. The formulation of the phase change problem is based on the latent heat model available in the literature. It is incorporated into the DPDe method to simulate a one-dimensional solid-liquid moving boundary problem. The solution domain is considered to be a two-dimensional Cartesian box where DPDe particles are randomly distributed. Periodic boundary conditions are applied in the flow direction and solid DPDe particles are placed as additional layers on the top and bottom of the domain. The DPDe result was compared with the available analytical solution and the effects of the DPDe parameters and thermal characteristics are discussed.

Inertio-capillary cross-streamline drift of droplets in Poiseuille flow using dissipative particle dynamics simulations

Soft Matter ◽  
2018 ◽  
Vol 14 (12) ◽  
pp. 2267-2280 ◽  
Author(s):  
Ryan L. Marson ◽  
Yuanding Huang ◽  
Ming Huang ◽  
Taotao Fu ◽  
Ronald G. Larson
Keyword(s):  
Poiseuille Flow ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Complex Interplay ◽  
Dimensionless Groups ◽  
Dynamics Simulations

Using simulations we find that deformable droplets under Poiseuille flow migrate to fixed positions within a microchannel that depend on a complex interplay between multiple controlling dimensionless groups.

Simulation of Thermal Conductivity of Nanofluids Using Dissipative Particle Dynamics

2012 ◽  
Author(s):  
Toru Yamada ◽  
Yutaka Asako ◽  
Mohammad Faghri ◽  
Chungpyo Hong
Keyword(s):  
Thermal Conductivity ◽  
Present Model ◽  
Volume Fraction ◽  
Particle Volume Fraction ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Interfacial Thermal Resistance ◽  
Particle Volume ◽  
Energy Conserving ◽  
Steady Heat

The effective thermal conductivity of Al2O3/water and CuO/water nanofluids were modeled by numerically solving steady heat flow in one-dimensional channels. This was accomplished by using energy conserving dissipative particle dynamics (DPDe). The effects of the interfacial thermal resistance and the Brownian motion of nanoparticles were incorporated in the model by modifying the conductive interaction parameter in the energy equation. The results were presented in the form of the thermal conductivity of nanofluids as functions of particle volume fraction and temperature, and were compared with the available experimental and analytical results. The present model agreed well with the experimental results for Al2O3/water nanofluid while there were discrepancies between the model and the results for CuO/water nanofluid.

Diffusive-Ballistic Heat Transport in Thin Films Using Energy Conserving Dissipative Particle Dynamics

2012 ◽  
Author(s):  
Toru Yamada ◽  
Sina Hamian ◽  
Keunhan Park ◽  
Yutaka Asako ◽  
Mohammad Faghri
Keyword(s):  
Thin Films ◽  
Heat Transport ◽  
Free Path ◽  
Dissipative Particle Dynamics ◽  
Mean Free Path ◽  
Particle Dynamics ◽  
Boundary Scattering ◽  
Solution Domain ◽  
Energy Conserving ◽  
Cutoff Radius

Diffusive-ballistic heat transport in thin films was simulated using energy conserving dissipative particle dynamics (DPDe). The solution domain was considered to be two-dimensional and DPD particles were distributed in the solution domain uniformly under constant temperature boundary conditions at the top and bottom walls and periodic boundary at the side walls. The effects of phonon mean free path was incorporated by its relation to the cutoff radius of energy interaction. This cutoff radius was obtained based on Knudsen number using the existing phonon-boundary scattering models. The simulations for 0.1 < Kn < 10 were conducted with the different modifications of the cutoff radius. The results were presented in form of temperature profile across the thin film and were compared with the semi-analytical solution of the equation of phonon radiative transport (EPRT). The discrepancy of the simulations without the phonon mean free path modification was less than 15% with EPRT. Good agreement with EPRT to within 5% was obtained when the phonon-boundary scattering effects were included.

Mesoscale Modeling of Non-Isothermal Fluid Displacement in Capillary Tube Using Dissipative Particle Dynamics

2012 ◽  
Author(s):  
M. S. Zaman ◽  
M. G. Satish
Keyword(s):  
Enhanced Recovery ◽  
Capillary Tube ◽  
Dissipative Particle Dynamics ◽  
Flow Simulation ◽  
Computer Code ◽  
Particle Dynamics ◽  
Mesoscale Modeling ◽  
Fluid Displacement ◽  
Energy Conserving ◽  
Isothermal Fluid

It is crucial to understand how one fluid is displaced by another at different temperature through a capillary, as many industrial and reservoir enhanced recovery methods fall into this category. Dissipative particle dynamics (DPD) method has been successfully applied to model mesoscale behaviors of many processes. In this paper, DPD method with energy conservation has been applied to model non-isothermal fluid displacement in capillary tube. Validation of the in-house computer code written in C# is carried out by modeling isothermal no-slip fluid flow. Simulation of non-isothermal fluid displacement using energy conserving DPD gives insight about the parameters affecting the flow.

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