Search results

Several works on numerical simulation of thermal performance of single tower [2, 3, 4, 5, and 6] are reported in the literatures.
Zhai and Fu [7] used both wind tunnel experiment and CFD simulation approaches to investigate the performance of windbreak methods for two cooling towers in-tandem arrangement under windy conditions.
The aim of this study is to investigate, using a general-purpose CFD code, the effect of different crosswind velocities and directions on the thermal performance of three aligned NDDCT utilizing the standard k–ε turbulence model.
For grid study of the present simulation, three sets of grids were used and considering the results with maximum difference of one percent in the heat transfer, the case with 2,543,200 cells was selected for three aligned towers at the final simulation.
Behnia: The Performance of Natural Draft Dry Cooling Towers Under Crosswind: CFD study, Int.

Note that the thermo-chemical behavior simulation based on CFD technology is to improve productivity with better injection formation.
Numerical Simulation.
For the equations being able to close, constraint conditions are to be given to solve the CFD model, then the simulation is carried out by numerical-approaching method.
It can be seen that the simulation shows the preferable forecasting result.
Conclusions Through analyzing the simulation results, the numerical simulation platform has been verified, and the errors have not influenced its validity.

Numerical Simulation and Design of Flow Field of Water-cooled Roller Based on FLUENT Zhou Xiong1, a, Wan Er-ping2, b, Zhang Peng3, c 1.
The optimal aperture of water hole is obtained through the contrastive analysis of simulation of different apertures of water holes.
Because the proportion of thermal radiation is very small, the simulation ignores the thermal effects of radiation
Water-cooled roller fluid internal temperature distribution shown in Fig 10: Fig. 10 Water cooled roller internal fluid temperature distribution 6 Prototype test results Based on the simulation results above, the test data of designed and manufactured water-cooled roller are as follows: Table 1 Plate electrolytic lead cathode pieces of data Empirical formula average thickness: average thickness = weight ÷ (length×thickness ×1.134)×100 Test analysis: (1) Thickness and uniformity of lead sheet have reached the scope of technology requirements; (2) During actual work process of the roller, the temperature test result in the axial direction of the roller by using the infrared thermometer is very uniform. 7 Conclusions The design achieve the optimized designing of the water-cooled rollers by the CFD simulation of water-cooled rollers and the actual operation of the water-cooled rollers simulation result proves that the simulation about water-cooled rollers
References: [1]Wang Fujun, Computational Fluid Dynamics-CFD Software Principle and Application, Beijing, 2004

With the advancement of computational fluid dynamics (CFD) technologies, numerical simulation has become increasingly prevalent in the investigation of GLTP flows within pumps.
Moreover, with the advancement of CFD technologies, numerical simulation has become increasingly prevalent in studying GLTP flows within pumps [18].
The Reynolds stress model and Large Eddy Simulation (LES).
In the CFD numerical simulation, 25 °C water is selected as the liquid phase working fluid.
CFD for centrifugal pumps: a review of the state-of-the-art.

An Investigation into the Effect of Design Parameters on Plasma Density in DBD (Dielectric Barrier Discharges) Jong-Bong Kim1, a and Myoung-Soo Shin2,b 1Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology, Seoul, 139-743, Korea 2LED Lighting Development group, LG Innotek, Hyuam-Ro 570, Munsan-Eup, Paju-Si, Gyeonggi- Do, 413-90,1Korea ajbkim@seoultech.ac.kr, bmsoo82@lginnotek.com Keywords: DBD (Dielectric Barrier Discharges), Plasma, Simulation.
In this study, the plasma density is predicted by a coupled simulation of gas flow, chemistry mixing and reaction, plasma generation, and electric field.
The analyses were carried out using commercial software CFD-ACE [11], and analysis modules for fluid dynamics, chemical reaction and mixing, electromagnetic field, and plasma transportation were included.
The analysis is carried out using commercial software ‘CFD-ACE’.
Fig. 8 Photos of water droplet on the Polyamide film (a)before plasma treatment and after plasma treatment with electric power of (b)150 W, (c)180 W, (d)210 W, and (e)240 W Fig. 9 Measured contact angle and calculated ion density for (a) gas velocity and (b) electric power Summary A curtain type DBD plasma generator, which is often used for the surface cleaning of semiconductors, has been subjected to analyses using the commercial code ‘CFD-ACE’.

Numerical Predication of Two-Phase Flow in Mixing Chamber of the Quick-Contact Cyclone Reactor Yuchun Zhang 1, a, Zhenbo Wang 1,b and Youhai Jin 1,c 1 State Key Laboratory of Heavy Oil, China University of Petroleum, Qingdao 266555, Shandong, China azhangyuchun29@163.com, bwangzhb@upc.edu.cn, cjinyh@upc.edu.cn Keywords: Eulerian model; gas-solid two-phase flow; quick-contact cyclone reactor; numerical simulation; FCC Abstract.
In this paper, the numerical simulation analysis of the quick-contact reactor was carried by using CFD software.
We used CFD software FLUENT6.3.26.
The simulation results are shown in figure 3.
The simulation results indicate that the two-phase flow in mixing chamber is very complex duo to the VGO injection and high turbulence intensity.

The loads and response are calculated through the CFD module System Coupling in software package ANSYS14.5.
The loads and response on the flexible riser are analyzed through the CFD module System Coupling in software package ANSYS14.5.
Numerical simulation and verification of the wave tank For  incompressible fluid, continuity equation is (1) Where is velocity vector of the flow.
Fig.1 Wave contour Fig.2 Wave amplitude at Fig.3 Wave’s shape in the damping region Simulation and analysis of flexible riser in the numerical wave-current tank The calculation is done with the aid of software WORKBENCH 14.5.
The loads and response on the flexible riser is analyzed through a series of numerical simulations.

Focus on the unfavorable effects of initial operation to the performance of ground heat exchangers, a three-dimensional CFD simulation of full-scale ground heat exchanger under dynamic load was established to investigate the heat transfer performance of a 120-meter vertical U-Tube ground heat exchanger under different initial operating time.
In order to find possible reasons, a three-dimensional CFD simulation of full-scale ground heat exchanger under dynamic load was established.
Two simulations under the same annual dynamic load and different initial operating time were conducted.
This paper combined with the engineering practice and used building thermal environment simulation software DeST to calculate the dynamic load of a public building in Xi'an for the whole year.
☆ Yan Ling Guan, female, born in April 1957, Ph.D, professor, The College of Environmental Science and Engineering, Chang’an University, Xi’an, Shaanxi, 710054, China E-mail:guanyl@chd.edu.cn References [1] Ingersoll L R, O J Zobel, Ingersoll A C: Heat conduction with engineering, geological, and other applications (USA 1954) [2] Kavanaugh, S P: Simulation and experimental verification of vertical ground coupled heat pump systems (Oklahoma State University 1985) [3] Nairen Diao: Heat Transfer Analyses of Ground Heat Exchangers and Their Engineering Applications (Tsinghua University 2004) [4] Eskilson P: Thermal analysis of heat extraction boreholes( Sweden Lund University 1987) [5] Min Li, Alvin C.K.

The three dimension CAD model is imported into the commercial CFD software.
Figure 6 The result of signal processing unit simulation in original design.
Figure 9 The result of signal processing unit simulation in creating vents.
Table 1 COMPARSION OF THE TWO SIMULATIONS RESULTS Components Temperature of the original design in the simulation Temperature of the modified design in the simulation D2 122˚C 104˚C D8 128˚C 105˚C D9 126˚C 105˚C D10 127˚C 105˚C D11 126˚C 105˚C Figure 11 Result of signal processing unit simulation in modified design.
CFD Analysis of an Avionic Module for Evaluating Power Distribution as a Thermal Management Measure for a Double-sided PCB.

This paper studies the spatial concentration distribution and particle tracks of students talking continuously in a classroom with two air distribution methods, including mixing ventilation (MV) and displacement ventilation (DV) using CFD simulations.
This paper studies the spatial concentration distribution of student talking continuously in a classroom with two air distribution methods, including mixing ventilation and displacement ventilation using CFD simulations.
At present, there are three simulation methods for turbulence, which are Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Reynolds-Averaged Navier-Stokes (RANS).
The simulation results could be in good agreement with experiment results using RNG k-εmodel, so this study using RNG k-ε model to simulate the indoor airflow.
Because of the high turbulence intensity and the small particle with the size of 5μm used in the simulation, the particles’ movement is mostly influenced by the indoor airflow.