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Application of numerical simulation in SSD technology As a mature numerical simulation technology, computational fluid dynamics (CFD) model has been widely used in the study of flow characteristics in a certain condition.
In CFD, the water-flow geometry is divided into many small units which are employed to describe questions, and then quality, momentum, energy and solid concentration equations of each grid are established.
As a result, it is of great significance to study SSD technology with numerical simulation.
Based on CFD software, calculation program which is used in the process of sediment stir and mixing is developed, preliminarily researching on its numerical analysis.
Convection and diffusion model [5, 6] based on classical diffusion theory is traditionally adopted to study numerical simulation of sediment movement.

According to the RNG model and the Euler method, the flow field inside hydrocyclone is simulated by the CFD.
In the past, people focused on the calculation of single-phase velocity field prediction and simulation of each phase, while the single phase swirl and simulation of multiphase were neglected.
Choong, in: A CFD study of the effect of cone dimensions on sampling aerocyclones performance and hydrodynamics, Powder Technology 162 (2006) 126 – 132
Dyakowski: Application of CFD to modelling of the flow in hydrocyclones.Is this a realizable option or still a research challenge?
GARTSHORE, in: A NUMERICAL SIMULATION OF HYDROCYCLONES.

Introduction The computational fluid dynamics (CFD) has become a kind of the most common and effective method, is used to analylzeyse indoor environment including flow field and temperature distributions distribution[1].
CFD can cope with the problem of fluid flow, heat transfer, and contamination transport.
The distributions rule for flow field and temperature field are analyszed based on the numerical simulation results[2-6], which can provide foundation for designing reasonable ventilation system based on optimizing air motion.
The three conversation principles, involving mass, momentum and energy are fundamental to CFD simulation[8].
An Eexample of Vverification, Vvalidation, and Rreporting of Iindoor Eenvironment CFD Analyses.

Their Quasi 2-D CFD Code has been discussed below.
The code was made for simulation of a disc with 10 mm outer diameter, 6 mm inner diameter and rotating at 200,000 rpm.
Geometric design of the WDE generated by Quasi 2-D CFD Code [1].
Janusz Piechna Model [12] Piechna’s calculation was based on simulation based on MEMS model.
[17] Pohořelský L., Macek J., Polašek M., Vítek, O., 2004, “Simulation of a COMPREX Pressure Exchanger in a 1-D Code.”

Temperature Analysis in Durability Test of the Viscous Damper Wang weining 1, a, Yan Weiming 1,b , Chen Yanjiang 1,c 1 School of Architecture and Civil Engineering, Beijing University of Technology, 100124, Beijing, China awangvn@hotmail.com, byanwm@bjut.edu.cn, acyjrlx@sina.com Keywords: Viscous Damper; Oil film; CFD Thermal; Temperature; Abstract.
In order to avoid the overheating generated by long working hours, which resulting in a viscous liquid water evaporation and leading to a abrupt increase in internal pressure inside the cylinder, the CFD software Fluent was used to simulate the durability test process of the oil film, where the heat was easy to generate and suggestion for improving the viscous damper was proposed.
Numerical Simulation Analyses As above mentioned, heat generated in cylinder and consumed mainly through viscous dissipation and internal friction.
On the basis of above analysis, CFD software Fluent was used to simulate the heat generation process and location in damper and determinate the key factors leading to elevation of the cylinder temperature.
Fig.3 Location Diagram of the Simulations In modeling, considering that the working velocity in the durability test should not be over 1m/s, and taking into account of width of the orifice and the viscosity of the fluid, the Reynolds number should be <2000[5], therefore Laminar flow model was adopted.

CFD can be seen as the numerical simulation of the flow under the control of flow basic equations
FDS Simulation.
Experiment Research of FDS Simulation Fire.
Computer Simulation. 2009 [5] Zhao Qiang.
Computer Simulation Overview of Fire and Flue Gas.

Optimization of Secondary Air Distribution in Biomass Boiler by CFD Analysis Martin LISÝ1,a *, Jiří POSPÍŠIL1,b, Otakar ŠTELCL1,c and Michal ŠPILÁČEK1,d 1Brno University of Technology, Faculty of Mechanical Engineering, Energy Institute, Technická 2896/2, 616 69 Brno, Czech Republic alisy@fme.vutbr.cz, bpospisil.j@fme.vutbr.cz, cstelcl@fme.vutbr.cz, dspilacek@fme.vutbr.cz, Keywords: CFD analysis, secondary air, flow, mixing, concentration Abstract.
This paper deals with a use of CFD modelling for optimization of supply of secondary combustion air in the two-chamber biomass boiler combusting very wet biomass (capacity ca. 200 kW).
The numerical model of the experimental boiler was built for subsequent utilization of CFD computation based on the finite element method.
Modern methods of computational simulation are a great tool in optimization of injections of combustion air.
Simulation of the flows in combustion chambers, visualisation of flow distribution and actions of gases are an important ground for optimization of shapes and operational conditions of the furnace.

By means of FLUENT, the general software of CFD, the swirling airflow field from different airflow head is simulated.
The simulation results are shown by the flow line graphs, tangential velocity, radial distribution graphs, etc.
The Numerica Silmulation of Airflow From Different Swirling Airflow Head With the development of the technology, the fluid can be simulated by FLUENT which is a general software of CFD[6].
Numerical simulation of airflow field can avoid blindness of experimental research and improve foresight of practical application.
Numerical simulation is done for different airflow field by FLUENT[7].

Research of flow coefficient of new throttling/sealing valve based on CFD Yabin Jin1, a Sanping Zhou 2,b Hong Zhang3,c Rui Yang 4,d 1,2Institute of Mechanical Engineering, Xi’an Shiyou University, Xi’an 710065, P.R.
Numerical simulation was performed on the flow coefficient of the valve by using FLUENT, software of computational fluid mechanics and by the standard model.
At present, in scientific research computational fluid dynamics (CFD) software is an important means to numerically simulate the fluid flow [5].
Results of Numerical Simulation and Research Calculation of Flow Coefficient and Resistance Coefficient.
Summary Conclusions can be reached through numerical simulation analyses on the new throttling/sealing valve by adopting the FLUENT software

This research used CFD to develop the clay brick kiln firing process.
The clay brick kiln simulation was developed using GAMBIT and ANSYS FLUENT.
Dimension and experimental design of eight-simulation model.
Temperature profiles for conventional model (model 1) and two other optimized developed models at simulation time of a) 1000s, b) 2000s and c) 4000s.
Conclusions This study showed that CFD can be used to simulate clay brick kiln firing.