Multiphase flows frequently occur in many important engineering and scientific applications, but modeling of such flows is a rather challenging task due to complex interfacial dynamics between different phases, let alone if the flow is oscillating in the porous media. Using humid air as the working fluid in the thermoacoustic refrigerator is one of the research focus to improve the thermoacoustic performance, but the corresponding effect is the condensation of humid air in the thermal stack. Due to the small sized spacing of thermal stack and the need to explore the detailed condensation process in oscillating flow, a mesoscale numerical approach need to be developed. Over the decades, several types of Lattice Boltzmann (LB) models for multiphase flows have been developed under different physical pictures, for example the color-gradient model, the Shan-Chen model, the nonideal pressure tensor model and the HSD model. In the current study, a pseudopotential Multiple-Relaxation-Time (MRT) LBM simulation was utilized to simulate the incompressible oscillating flow and condensation in parallel plates. In the initial stage of condensation, the oscillating flow benefits to accumulate the saturated vapor at the exit regions, and the velocity vector of saturated vapor clearly showed the flow over the droplets. It was also concluded that if the condensate can be removed out from the parallel plates, the oscillating flow and condensation will continuously feed the cold surface to form more water droplets. The effect of wettability to the condensation was discussed, and it turned out that by increasing the wettability, the saturated water vapor was easier to condense on the cold walls, and the distance between each pair of droplets was also strongly affected by the wettability. It’s expected that this study can be used to optimize and redesign the structure of thermal stack in order to produce more condensed water, also this multiphase approach can be extended to more complicated 3D structures.
Skip Nav Destination
ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum
June 24–28, 2018
Lake Buena Vista, Florida, USA
Conference Sponsors:
- Power Division
- Advanced Energy Systems Division
- Solar Energy Division
- Nuclear Engineering Division
ISBN:
978-0-7918-5140-1
PROCEEDINGS PAPER
Numerical Simulation of Oscillating Multiphase Heat Transfer in Parallel Plates Using Pseudopotential Multiple-Relaxation-Time Lattice Boltzmann Method Available to Purchase
Wandong Zhao,
Wandong Zhao
Nanchang University, Nanchang, China
Search for other works by this author on:
Ben Xu,
Ben Xu
University of Texas Rio Grande Valley, Edinburg, TX
Search for other works by this author on:
Ying Zhang
Ying Zhang
Nanchang University, Nanchang, China
Search for other works by this author on:
Wandong Zhao
Nanchang University, Nanchang, China
Ben Xu
University of Texas Rio Grande Valley, Edinburg, TX
Ying Zhang
Nanchang University, Nanchang, China
Paper No:
POWER2018-7544, V002T10A009; 10 pages
Published Online:
October 4, 2018
Citation
Zhao, W, Xu, B, & Zhang, Y. "Numerical Simulation of Oscillating Multiphase Heat Transfer in Parallel Plates Using Pseudopotential Multiple-Relaxation-Time Lattice Boltzmann Method." Proceedings of the ASME 2018 Power Conference collocated with the ASME 2018 12th International Conference on Energy Sustainability and the ASME 2018 Nuclear Forum. Volume 2: Heat Exchanger Technologies; Plant Performance; Thermal Hydraulics and Computational Fluid Dynamics; Water Management for Power Systems; Student Competition. Lake Buena Vista, Florida, USA. June 24–28, 2018. V002T10A009. ASME. https://doi.org/10.1115/POWER2018-7544
Download citation file:
38
Views
Related Proceedings Papers
Related Articles
Investigation of Flashing Flow in a Siphon to Extract Condensate in Paper Dryer Application
J. Thermal Sci. Eng. Appl (August,2021)
Modeling Transport in Porous Media With Phase Change: Applications to Food Processing
J. Heat Transfer (March,2011)
Condensate Retention Effects on the Performance of Plain-Fin-and-Tube Heat Exchangers: Retention Data and Modeling
J. Heat Transfer (October,2001)
Related Chapters
Evaluation of Moisture Accumulation in Composite Roof Decks in High Humidity Environments such as Natatoriums in Cold Climates Using Hygrothermal Modeling
Roofing Research and Standards Development: 10th Volume
Thermal Design Guide of Liquid Cooled Systems
Thermal Design of Liquid Cooled Microelectronic Equipment
Scope of Section I, Organization, and Service Limits
Power Boilers: A Guide to the Section I of the ASME Boiler and Pressure Vessel Code, Second Edition