- UHRA Home
- University of Hertfordshire
- Browsing University of Hertfordshire by Author
Browsing University of Hertfordshire by Author "Chen, Yong"
Now showing items 21-40 of 42
-
Numerical scheme to simulate combined mixing and separating Newtonian fluid flow in a channel
Khokhar, Rahim; Chen, Yong; Calay, Rajnish; Xu, Yigeng (2013)The paper presents a semi-implicit time-stepping Taylor-Galerkin pressure correction primitive variable finite element algorithm to simulate fluid flow for two dimensional planar combined mixing and separating geometry. ... -
Numerical simulation of combined mixing and separating flow in channel filled with porous media
Khokhar, Rahim; Chen, Yong; Xu, Yigeng; Calay, Rajnish (2013-05)Various flow bifurcations are investigated for two dimensional combined mixing and separating geometry. These consist of two reversed channel flows interacting through a gap in the common separating wall filled with porous ... -
On Power and Control Systems of the Multibody Advanced Airship for Transport
Khoshnoud, Farbod; Chen, Yong; Calay, Rajnish (2013)The concept of the Multibody Advanced Airship for Transport (MAAT) is presented. The power, propulsion and control systems of the airship are discussed. The energy required for operation of this airship is supplied by a ... -
On the Measurement of Roller Skew of Tapered Roller Bearings
Falodi, A.; Chen, Yong; Caspall, Martin; Earthrowl, Brian; Dell, David (2012-11)Roller skew in roller bearings can cause heat generation and reduce bearing life. Therefore, design to minimise its occurrence is essential in bearing development. This study investigated the roller skew of a double row ... -
On the turbulent flow models in modelling of omni-flow wind turbine
Chen, Yong; Ying, Pei; Xu, Yigeng; Tian, Yuan (2014-10)The computational fluid dynamics (CFD) has a wide application in the wind energy industry. In CFD simulations, a turbulence model plays a significantly important role in accuracy and resource cost. In this paper, a novel ... -
One-step hydrothermal synthesis of fluorescence carbon quantum dots with high product yield and quantum yield
Yanting Xie, Yanting; Zheng, Jingxia; Wang, Yaling; Wang, Junli; Yang, Yongzhen; Liu, Xuguang; Chen, Yong (2019-01-02)A one-step hydrothermal synthesis of nitrogen and silicon co-doped fluorescence carbon quantum dots (N,Si-CQDs), from citric acid monohydrate and silane coupling agent KH-792 with a high product yield (PY) of 52.56% and ... -
The preparation and tribological properties of surface modified zinc borate ultrafine powder as a lubricant additive in liquid paraffin
Zhao, Chuanli; Chen, Yong; Jiao, Yang; Loya, Adil; Ren, Guogang (2014-02-01)This paper investigates the effects of surface modification of zinc borate ultrafine powders (ZB UFPs) on their tribological properties as lubricant additives in liquid paraffin (LP). ZB UFPs were successfully modified by ... -
Preparation of N-doped carbon dots based on starch and their application in white LED
Liu, Xinghua; Zheng, Jingxia; Yang, Yongzhen; Chen, Yong; Liu, Xuguang (2018-12-01)N-doped carbon dots (CDs) were synthesized simply and economically by a one-step hydrothermal method using starch as a carbon source and ethylenediamine (EDA) as a nitrogen dopant. The prepared CDs possess the properties ... -
A Review of Computational Fluid Dynamics Simulations on PEFC Performance.
Chen, Yong; Enearu, Louise; Montalvao, Diogo; Sutharssan, Thamo (2016-12-10)Among the number of fuel cells in existence, the proton exchange fuel cell (PEFC) has been favoured because of its numerous applications. These applications range from small power generation in cell phones, to stationary ... -
A review on prognostics and health monitoring of proton exchange membrane fuel cell
Sutharssan, Thamo; Montalvao, Diogo; Chen, Yong; Wang, Wen Chung; Pisac, Claudia; Elemara, Hakim (2017-08-31)Fuel cell technology can be traced back to 1839 when British scientist Sir William Grove discovered that it was possible to generate electricity by the reaction between hydrogen and oxygen gases. However, fuel cell still ... -
Self-Powered Dynamic Systems
Khoshnoud, Farbod; Dell, David; de Silva, Clarence W.; Chen, Yong; Owhadi, Houman; Calay, Rajnish (2013-07)This article concerns the concept of energy harvesting associated with dynamic systems. The particular area of work is the concept of fully or partially self-powered dynamic systems requiring zero or reduced external energy ... -
Stability analysis of the MAAT feeder airship during ascent and descent with wind disturbances
Neydorf, Rudolf; Sigida, Youriy; Voloshin, Vitaly; Chen, Yong (2013-12-19)This paper looks into with the aerodynamic properties and stability of the feeder airship in the framework of MAAT project. FP7 MAAT project is based on the concept of two different types of airships (the cruiser and the ... -
A study of surface modifications of carbon nanotubes on the properties of polyamide 66/multiwalled carbon nanotube composites
Qiu, Li; Chen, Yong; Yang, Yongzhen; Xu, Lihua; Liu, Xuguang (2013-10-29)The effects of surface modification of carbon nanotube on the properties of polyamide 66/multiwalled carbon nanotube composites have been investigated. Polyamide 66 (PA66) and multiwalled carbon nanotubes (MWCNTs) composites ... -
A Study of Tribological Properties of Water-Based Ceria Nanofluids
Zhao, Chuanli; Chen, Yong; Ren, Guogang (2013-03-01)This paper presents an investigation on the potential tribological properties of the water-based cerium dioxide nanofluids. The nanofluids with different nanoparticle concentrations were prepared in a materials laboratory. ... -
The surface modifications of multi-walled carbon nanotubes for multi-walled carbon nanotube/poly (ether ether ketone) composites
Cao, Zongshuang; Qiu, Li; Yang, Yongzhen; Chen, Yong; Liu, Xuguang (2015-10-30)The effects of surface modifications of multi-walled carbon nanotubes (MWCNTs) on the morphology, dynamic mechanical and tribological properties of multi-walled carbon nanotube/poly(ether ether ketone) (MWCNT/PEEK) composites ... -
Surface Morphology Evolution Mechanisms of InGaN/GaN Multiple Quantum Wells with Mixture N2/H2-Grown GaN Barrier
Zhou, Xiaorun; Lu, Taiping; Zhu, Yadan; Zhao, Guangzhou; Dong, Hailiang; Jia, Zhigang; Yang, Yongzhen; Chen, Yong; Xu, Bingshe (2017-05-16)Surface morphology evolution mechanisms of InGaN/GaN multiple quantum wells (MQWs) during GaN barrier growth with different hydrogen (H2) percentages have been systematically studied. Ga surface-diffusion rate, stress ... -
Synthesis and optical properties of composite films from P3HT and sandwich-like Ag-C-Ag nanoparticles
Yan, Lingpeng; Hao, Yamin; Xiaoting Feng, Xiaoting; Yang, Yongzhen; Liu, Xuguang; Chen, Yong; Xu, Bingshe (2015-09)Sandwich-like Ag-C-Ag nanoparticles (Ag-C-Ag NPs) were synthesized under mild hydrothermal conditions in a one-step method. With this approach, Ag was not only encapsulated in the centre of an individual carbon nanosphere, ... -
Temperature and magnetism bi-responsive molecularly imprinted polymers: Preparation, adsorption mechanism and properties as drug delivery system for sustained release of 5-fluorouracil
Li, Longfei; Chen, Lin; Zhang, Huan; Yang, Yongzhen; Liu, Xuguang; Chen, Yong (2016-04-01)Temperature and magnetism bi-responsive molecularly imprinted polymers (TMMIPs) based on Fe3O4-encapsulating carbon nanospheres were prepared by free radical polymerization, and applied to selective adsorption and controlled ... -
Thermal analysis of Phase Change Material Board (PCMB) under weather conditions in the summer
Zhou, D.; Tian, Yuan; Qu, Y.; Chen, Yong (2016-04-25)Phase Change Material Board (PCMB) has been considered as an effective way to improve the thermal comfort in either new or existing buildings. In this work, firstly the optimal melting temperatures of internal and external ... -
The tribological properties of zinc borate ultrafine powder as a lubricant additive in sunflower oil
Zhao, Chuanli; Jiao, Yang; Chen, Yong; Ren, Guogang (2014)This paper presents an investigation on the tribological properties of zinc borate ultrafine powder employed as a lubricant additive in sunflower oil. The stable dispersions of 0.5 wt%, 1 wt% and 2 wt% zinc borate ultrafine ...