Search results

Many researchers have studied the drying process based on mathematical model and simulation in order to predict the temperature and velocity profile of hot air flow in the drying chamber [2-5].
Pimsamarn et al. [3] numerically investigated the distribution of air flow and temperature by using Computational Fluid Dynamics (CFD) of the average exhaust air temperature of 56 °C with air velocity of 1.75 m/s.
Axcell: Simulation Modelling Practice and Theory, Vol. 17 (2009), pp. 871-882.

In term of fluid flow behaviour, low Re no. calculated from the gained data shows that the entrapped water in the cavity had laminar flow. 0.2Hz 1.0Hz 2.0Hz Fig. 3 Scatterplot of Displacement Fig. 4 Simulation of the oscillating membrane and Input frequency, fin Fig. 5 Fig. 6 Conclusion The Re numbers obtained from the pre-determined input frequency range was between 14 and 35.
Despite obtaining these numbers, the more accurate data of the laminar flow such as the fluid velocity could be anticipated using computational fluid dynamic (CFD) simulation approach.

., A New Whole Wall R-value Calculator, An Integral Part of the Interactive Internet Based Building Envelope Materials Database for Whole-Building Energy Simulation Programs, 2004
Clarke, Energy Simulation in Building Design, Adam Hilger Ltd, UK, 1985
Frank, Experimental and numerical thermal analysis of a balcony board withintegrated glass fibre reinforced polymer GFRP elements, Energy and Buildings 39 (2007) 76–81 [7] FLOVENT, CFD (computational fluid Dynamics), 3D Airflow Modeling Software, Mentor graphics corporation, USA, Version 9.1, 2011.

Introduction At present, a number of beneficial attempts at the research on VIV mechanism have been made by many scholars at home and abroad based on the wind tunnel test or CFD numerical simulation.
It can be seen that both of vertical and torsional VIV disappear due to the shift of inside maintenance rails, in accordance with the results of CFD numerical simulations and static pressure measurements discussed above.

Using the numerical simulation method analyze the free diffusion process of poison gas (chlorine) and the effect that control - exhaust type emergency ventilation system on gas diffusion and transport in large space buildings.
this paper aims at emergency gas diffusion and transport control problems in large space buildings with obstacles, the application of CFD numerically simulates indoor obstacles affect of gas free diffusion, discusses the control-exhaust emergency ventilation technology with obstacles in large space buildings on gas diffusion and transport process control function.
Ventilating and air conditioning system would be shut down in the simulation considering it mainly analyzed the influence of the indoor obstacles on poison gas diffusion (as shown Fig. 1).
Numerical Simulation of Diffusion Process of Cl2 in Large Space Buildings with Obstacles The diffusion process and concentration distribution principle of Cl2 in control-exhaust mode of emergent ventilation.
The numerical simulation results of chlorine diffusion process and concentration distribution in the static air were shown in Fig. 6 and Fig. 7.

CFD modeling has emerged as a powerful tool for the prediction of ice shape and for the simulation and optimization of ice protection systems.
The objective of this part is to illustrate that the numerical simulation method presented in this paper can apply to any complex three-dimensional structure.
Applying the numerical simulation technique, ice accretion results are obtained both on NACA0012 and a four-element wing surface.
Guangning, et al.: Icing Numerical Simulation for Single and Multi-Element Airfoils, 28th AIAA Applied Aerodynamics Conference, AIAA 2010-4232 (2010) [4] A.R.
Luke: Eulerian simulation of icing collection efficiency using a singularity diffusion model, AIAA 2005-12466 (2005) [13] W.Q.

The shrinkage and collapse of cavity zone and violent changes of the pressure field have been captured during the simulation.
The water exit numerical simulation, by Liu Zhiyong with MAC (Marker And Cell) method and consideration of cavity, indicated the formation of retroreflective water.[9] Quan Xiaobo conducted series of experiment and theory research to investigate the mechanism of cavity collapse.[10] The transient and strong nonlinearity makes the research on cavity flow during water exit very tricky.
To validate the CFD numerical method and computational model, the flow field around the vehicle at three different cavitation numbers has been simulated.
Conclusions The numerical simulation of water exit considering cavity has been conducted.
(Underwater Ordance Department, China Lake, California, 1961) [9] Zhiyong Liu, Shuqun Yi, and Kai Yan: Numerical Simulation of Water-Exit Cavity (Osaka, Japan: Fifth International Symposium on Cavitation, 2003) [10] Xiaobo Quan, Yan Li, Haipeng Wei, and Haibo Lv: Journal of Ship Mechanics Vol. 4(12) (2008) p.545-549 (in Chinese) [11] Rouse H. and McNown J.S.: Cavitation and Pressure Distribution, Head Forms at Zero Angle of Yaw (Studies in Engineering Bulletin 32, State University of Iowa, 1948)

Petersburg State Polytechnical University, Russia, 195251, St.Petersburg, Polytechnicheskaya, 29 avatin@mail.ru, bkstrelets@mail.ru, cnkharkov@mail.ru Keywords: flow swirling, separation, cyclone, dedusting, numerical simulation, hydrodynamics Abstract.
To estimate the spectrum of possible technological innovations in the existing structure expedient first carry out numerical simulations using fluid dynamics software packages [13-14].
This paper presents the numerical simulation of classical construction of countercurrent cyclone; the results are compared with the calculation for the case of a conical nozzle on the exhaust pipe.
No Injection Inlet section [kg/s] Output section [kg/s] Dust outlet [%] (Injection 1) d=10-6 [m] 0.002375 0.001625 65 (Injection 2) d=3·10-6 [m] 0.002375 0.000875 36.8 (Injection 3) d=5·10-6 [m] 0.002375 0 0 (Injection 4) d=6·10-6 [m] 0.002375 0 0 (Injection 5) d=10-5 [m] 0.002375 0 0 Fig. 8 Flow path Fig. 9 Distribution of the total pressure Summary The main results obtained in the numerical simulation are total pressure loss in the cyclone and the efficiency of dedusting.
Telecommunication and Control Systems. 2010, Vol. 5, No. 108, pp. 156-159 [13] Khairy Elsayed, Chris Lacor Optimization of the cyclone separator geometry for minimum pressure drop using mathematical models and CFD simulations Chemical Engineering Science, Vol. 65, Issue 22, 15 November 2010, pp. 6048–6058 [14] S.I.

Simulations of the FORMOSAT-5 Cold Gas Propulsion System by Using the Hybrid Continuum-Particle Method K.
Another approach for solving the flow fields with near-continuum to rarefied gas is to develop a numerical model combining the CFD method for the continuum regime with the DSMC method for the rarefied and thermal nonequilibrium regime.
Therefore, simulations with different pressures are necessary for future operations.
Hybrid solver distribution of the cold gas propulsion simulation.
Bird, “Molecular gas dynamics and the direct simulation of gas flows,” Oxford Univ.

Fire simulation on buildings with accommodation inside the factory (hazard): use fire simulation to analyze the effective evacuation time with residential fire alarms.
Chen, A study of Hazard Rescue Simulation for Steel Frame Building at Residential and Commercial Mixed Area-Examle of Fukano Bakery Fire in Changhua County, DaYeh University, (2017)
Smokeview, A Tool for Visualizing Fire Dynamics Simulation Data Volume I: User's Guide, NIST Sp.
Jang, CFD Simulation and Assessment of Life Safety in a Subway Train Fire, Tunnel.