Open Access
ABSTRACT
Jingfa Li1,2, Shuyu Sun2,*, Bo Yu1, Yang Liu2, Tao Zhang2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 141-142, 2019, DOI:10.32604/icces.2019.04721
Abstract The multiphase fluid flow in porous media is one of the most fundamental phenomena in various physical processes, such as oil/gas flow in reservoir, subsurface contamination dispersion, chemical separation, etc. Due to its importance, the efficient and accurate solution and prediction of multiphase flow in porous media is highly required in engineering applications and mechanism studies, which has been a research hot spot with increasing interest in recent years. However, the strong nonlinearity implicated in the multiphase flow model has brought great challenges for the computation and analysis. In addition, the permeability in Darcy-type pressure equation is always represented as… More >
Open Access
ABSTRACT
Xinyu You1, Jionghui Liu1, Nan Hua1,3, Ji Wang5, Rongji Xu1,4, Guangxu Yu2, Huasheng Wang1,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 143-143, 2019, DOI:10.32604/icces.2019.04732
Abstract The paper reports preliminary measurement results for flow boiling heat transfer of refrigerant R1233zd in parallel horizontal microchannels. The aluminum test section consists of two blocks and has 10 parallel channels with 1.0 mm in width, 1.5 mm in height and 440 mm in length. Five small thermocouple holes with diameter 0.6 mm and depth 20 mm were drilled at 10 locations along the channel on the two aluminum blocks, respectively. Local heat flux and channel surface temperature along the channel were obtained using the inverse heat conduction method [1] based on temperatures accurately measured by 100 thermocouples. Local saturation… More >
Open Access
ABSTRACT
Long Jiao1,2, Zhibin Wang1,2, Rong Chen1,2,*, Xun Zhu1,2, Qiang Liao1,2, Dingding Ye1,2, Biao Zhang1,2
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 144-146, 2019, DOI:10.32604/icces.2019.04734
Abstract With the advances in micro total analysis systems (µTAS), the droplet-based microfluidics, which manipulates mini discrete droplets in an immiscible continuous phase to accomplish various detections, has been applied to many fields including medicine, pharmacy, fine-chemistry and biotechnology as it offers distinct advantages, such as small diffusion length, high-throughput, precise control and integratability [1]. As compared to the continuous-flow microfluidics, the samples in the droplet-based microfluidics are isolated by a defined droplet/continuous phase interface, avoiding the cross contamination and resulting in a controllable reaction environment. In the droplet-based microfluidics, the control of the droplet temperature with prominent temporal spatial resolution… More >
Open Access
ABSTRACT
Daobing Wang1,2, Bo Yu1,*, Dongliang Sun1, Dongxu Han1, Jingfa Li1, Hao Qin1, Peng Wang1, Xufei Yang1, Yajun Deng1
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 147-148, 2019, DOI:10.32604/icces.2019.04786
Abstract Hot dry rock (HDR), which is usually buried depth in 3-10 km, contains abundant heat energy for heating the house and making the electricity. Hydraulic fracturing is an effective technology to develop the geothermal resources. In hydraulic fracturing, a large amount of cold water is injected to generate the artificial fractures in subsurface. However, in previous studies, the study on the mechanical properties of HDR under the combined action of triaxial stress and pore pressure is still in its infancy and an exhaustive investigation is lacking. In this study, we experimentally investigated the heat-treated HDR samples with the integrated consideration… More >
Open Access
ABSTRACT
Peng Wang, Huaxing Zhai, Gehan Liu, Xiaohua Wu, Dongliang Sun* and Bo Yu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 149-150, 2019, DOI:10.32604/icces.2019.04963
Abstract The isothermal drying of plant-based material, such as fruits and vegetables, is the most widely used drying technique to stabilize materiel and to increase their shelf life. However, drying is a high energy-consuming industry process, in which water removal obviously affects the quality of dried products. Therefore, it is crucial to understand the water migration mechanisms during drying for improving energy efficiency and ensuring better quality.
Plant-based material generally has highly porous characteristics, and the major part of the water (about 80-90%) is present in the intracellular space, but not in the intercellular (pore) space. There are three pathways… More >
Open Access
ABSTRACT
Yang Li1, Wenjing Zhou1,*, Yonghai Zhang1, Baojin Qi1, Jinjia Wei1, 2, *
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 151-151, 2019, DOI:10.32604/icces.2019.04982
Abstract Nucleation boiling is used in a wide range of engineering and science fields, such as electronics cooling, new energy and the microelectromechanical systems (MEMS) technology. Besides, a better understanding of the nucleation is fundmental significance for the application and enchcement of nucleation boiling in the traditional and modern high-tech industries. Unfortunately, due to the complexity of physical mechanisms in nanoscale and the limit of small scale, accurate experimentation of nucleation cannot be accomplished. Therefore, it is important to study the influence of solid properties on nucleation despite its general importance by performing molecular dynamics simulation researches. In present work, we… More >
Open Access
ABSTRACT
Shangmin Ao, Peng Wang*, Lin Zhang, Yajun Deng, Dongliang Sun*, Bo Yu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 152-153, 2019, DOI:10.32604/icces.2019.05005
Abstract The problem of fluid flow and heat transfer in porous media is one common phenomenon in industrial production and daily life. Numerical simulation for the above problem can provide a realistic understanding of transport processes and thus can help to optimize energy consumption. However, in the macroscopic model of fluid flow and heat transfer, the convergence rate of traditional numerical methods is usually poor as the hygroscopic properties of porous media. Therefore, it is of great significance to develop an efficient algorithm for the macroscopic model of fluid flow and heat transfer in porous media. The IDEAL (Inner Doubly-iterative Efficient… More >
Open Access
ABSTRACT
Zhenchuan Wang1,2, Ruina Xu2, Peixue Jiang2,*
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 154-154, 2019, DOI:10.32604/icces.2019.05023
Abstract Deeply analysis and prediction of turbulent convection heat transfer of supercritical pressure fluid in one-side non-uniform heating vertical tube plays a major role in system design and security. The Over-prediction of convection heat transfer of supercritical pressure fluid in vertical tube is attributed, at least partly, to the invalid of turbulent model on simulating the buoyancy effect. The present paper adopt an improved turbulent model, which is validated suitable to three dimensional model, to simulate flow and heat transfer of supercritical pressure water in vertical non-uniform heating tube. Heat transfer deterioration phenomenon occurs in non-uniform heating condition, while the degree… More >
Open Access
ABSTRACT
Sheng Jia, Guojun * Yu**, Yanting Geng, Lizhi Zhang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 155-155, 2019, DOI:10.32604/icces.2019.05100
Abstract Crude oil tanker usually encounters rolling motion during sea transportation, which leads to a rotational movement and sometimes a sloshing for the liquid hold. This rolling-induced body motion seriously affects the thermal and hydraulic behavior of liquid hold, which then affects the heating process and heat preservation of the tanker. Clarification of the involved thermal and hydraulic characteristic is the basic requirement for establishment of a scientific heating scheme and heat preservation method. Numerical simulation for such a problem faces challenges in terms of free liquid surface movement, rotational acceleration and shear-dependent viscosity (non-Newtonian behavior) of the liquid. Free surface… More >
Open Access
ABSTRACT
Cong Liu, Guojun Yu*, Sheng Jia
The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 156-156, 2019, DOI:10.32604/icces.2019.05101
Abstract Geothermal energy, clean and renewable, has attracted more and more attention in this century challenged by energy crisis and climate change. Ground source heat pump (GSHP) technology, which has been widely applied in the field of heating, ventilating and air conditioning (HVAC), is one of the most important ways to utilize geothermal energy. The buried pipe heat exchanger system is the core of GSHP, sufficient investigations should be conducted prior to its design to clarify the relevant thermal and hydraulic characteristics. Numerical calculation is much more practical than experimental research for the buried pipe heat exchanger systems due to the… More >
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