An SPH-based mass transfer model for simulating hydraulic characteristics and mass transfer process of dammed rivers

2021 ◽  
Author(s):  
Hang Wan ◽  
Yingzhu Mao ◽  
Yanpeng Cai ◽  
Ran Li ◽  
Jingjie Feng ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Transfer Process ◽  
Mass Transfer Process ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
Hydraulic Characteristics

Mass transfer model of supercritical fluid degradation for carbon fiber composites

2016 ◽  
Vol 51 (8) ◽  
pp. 1073-1085 ◽  
Author(s):  
Huanbo Cheng ◽  
Jie Zhang ◽  
Haihong Huang ◽  
Zhifeng Liu
Keyword(s):  
Mass Transfer ◽  
Carbon Fiber ◽  
Supercritical Fluid ◽  
Transfer Process ◽  
Mass Transfer Rate ◽  
Mass Transfer Process ◽  
Fiber Composites ◽  
Transfer Model ◽  
Carbon Fiber Composites ◽  
Mass Transfer Model

It is critical to study the mass transfer of supercritical fluid degradation for carbon fiber composites to investigate their degradation mechanism, design the reactor, and develop recycling processes. The mass transfer process of supercritical fluid degradation was described from two aspects: mass diffusion from outside to inside, and from inside to outside. Mass transfer model of supercritical fluid degradation was established based on a proposed concentric cylindrical representative volume element. The reaction kinetic parameters were incorporated into the mass transfer equation, and the concentration distribution of supercritical fluid, mass transfer rate, reaction order, and reaction rate constant during the carbon fiber composites degradation process were calculated. Relaxation time was incorporated into the mass transfer process, and the supercritical fluid concentration calculation method considering non-Fick effect was proposed. Finally, two pretreatment methods were adopted to speed up the mass transfer process.

A Study of GOTHIC 8.0 Code Application to AP1000 Containment Response

2013 ◽  
Author(s):  
Guodong Wang ◽  
Zhe Wang
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Mass Transfer Process ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
Containment Model ◽  
Evaporation Heat ◽  
Containment Shell ◽  
Film Heat Transfer ◽  
Inside Wall

The AP1000 containment model has been developed by using WGOTHIC version 4.2 code. Condensation heat and mass transfer from the volumes to the containment shell, conduction through the shell, and evaporation from the shell to the riser were all calculated by using the special CLIMEs model. In this paper, the latest GOTHIC version 8.0 code is used to model both condensation and evaporation heat and mass transfer process. An improved heat and mass transfer model, the diffusion layer model (DLM), is adopted to model the condensation on the inside wall of containment. The Film heat transfer coefficient option is used to model the evaporation on the outside wall of containment. As a preliminary code consolidation effort, it is possible to use GOTHIC 8.0 code as a tool to analysis the AP1000 containment response.

Heat and Mass Transfer Model for the Thin Material Layer Consisting of Zinc-Containing Pellets in Rotary Hearth Furnace

2011 ◽  
Vol 236-238 ◽  
pp. 789-794
Author(s):  
Ying Liu ◽  
Nai Shuai Wang ◽  
Zhi Wen ◽  
Guo Feng Lou
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Control Volume ◽  
Mass Transfer Process ◽  
Transfer Model ◽  
Mass Transfer Model ◽  
State Equations ◽  
Material Layer ◽  
Metallization Rate ◽  
Single Pellet

In this paper, a mathematical model is established to simulate heat and mass transfer process among the thin material layer consisting of zinc-containing pellets while being reduced in Rotary Heath Furnace (RHF). The material layer model is based on a single pellet model, coupling heat and mass transfer and chemical reactions. The model essentially involved solving the unsteady-state equations with appropriate initial and boundary conditions using the control volume formulation. Temperature distribution, gas phase concentration, metallization rate, and dezincing rate have been obtained and discussed.

A COMBINED HEAT AND MASS TRANSFER MODEL FOR THE RANQUE HILSCH VORTEX TUBE

2018 ◽  
Author(s):  
M. Chatterjee ◽  
S. Mukhopadhyay ◽  
P. K. Vijayan
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Vortex Tube ◽  
Transfer Model ◽  
Mass Transfer Model

Simulation of volumetric heating of a moist medium with allowance for fluid mobility

2012 ◽  
Vol 9 (1) ◽  
pp. 91-93
Author(s):  
U.R. Ilyasov ◽  
A.V. Dolgushev
Keyword(s):  
Mass Transfer ◽  
Porous Medium ◽  
Numerical Solution ◽  
Heat And Mass Transfer ◽  
Transfer Process ◽  
Thermal Action ◽  
Mass Transfer Process ◽  
Low Permeability ◽  
Volumetric Heating ◽  
Drying Regime

The problem of volumetric thermal action on a moist porous medium is considered. Numerical solution, the influence of fluid mobility on the dynamics of the heat and mass transfer process is analyzed. It is established that fluid mobility leads to a softer drying regime. It is shown that in low-permeability media, the fluid can be assumed to be stationary.

Multilevel cross flow rotating packed bed to enhance gas film control mass transfer process

2021 ◽  
Vol 161 ◽  
pp. 108321
Author(s):  
Qing-Qing Duan ◽  
Zhi-Guo Yuan ◽  
You-Zhi Liu ◽  
Shan-Shan Duan ◽  
Xi-Fan Duan
Keyword(s):  
Mass Transfer ◽  
Transfer Process ◽  
Cross Flow ◽  
Mass Transfer Process ◽  
Packed Bed ◽  
Rotating Packed Bed
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