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CFD methods of turbulence are Direct Numerical Simulation (DNS), Large Eddy Simulation (LES) and Reynolds time average equation method.
The later two are Indirect Numerical Simulation.
The method will become a trend in CFD modeling for stirred reactor with the increase of computer performance.
Parallel computing CFD computation needs high speed and large capacity CPU.
CFD study of mixing process in stirred tank [J].

This study uses a numerical simulation method on CFD ANSYS FLUENT 19.1 software to determine the distribution of temperature, velocity, and ash particle data in the LTSH boiler area.
Methodology The investigation consists of 3 steps, namely making numerical simulations using CFD software for modelling, analyzing combustion in boilers with Coal Optimization using coal with 4400 kcal/kg and 4000 kcal/kg based on performance test data.
Modeling and Simulation Stage.
[5] Dewangan, K., Kumar, S., & Singh, R, Analysis and Optimization of Boiler Tube Failure Due To Erosion Using CFD Package.
[9] Krisnanda, LR, Analisa Laju Erosi pada Elbow Pipa Karena Partikel Pasir dalam Aliran Fluida Gas Menggunakan Simulasi CFD.

Abstract：This paper describes the hydrodynamic performance prediction of ship hull with propeller by using CFD techniques.
Introduction Due to the rapid advances in computer power, different CFD methods are increasingly applied to simulate the full model including ship hull with propeller, and investigate the flow features for various states.
Conclusions Based on the CFD technology, this paper discussed the hydrodynamic performance prediction for KRISO container ship using different turbulence models.
As a result, the CFD method was verified, and the computational results were validated.
Simulation of Propeller-Hull Interaction using an integrated VLM/RANSE Solver modeling.

And then CFD is selected and accepted gradually to be a timely way to study complicated lubrication problems.
The meshes used in the simulations are structured and uniform, and the structural meshes near the boundary of various computing models get refined by the method of adaptive mesh refinement algorithm to improve the computational accuracy.
The surfaces throughout the simulations were assumed to be rigid.
Results and Discussion The results of the numerical simulations for various micro structures of grooves are performed.
However, the numerical results of CFD approach based on N-S equations should be examined by engineering experiments deeply.

Rezende [5] reviewed through CFD a turbulent separation bubble on a tilted thin flat plate.
Due to its simplicity it has been widely used for CFD calculations.
The mesh was generated through the ICEM CFD software.
Simulation of a turbulent separation bubble using RANS. 2012. 95f.
Proceedings of the 21st Conference of the CFD Society of Canada, Sherbrooke, QC, Canada, May 2013.

Secondly, the constructed three-dimensional model is meshed by ICEM CFD software.
The results of the simulation show that the temperature near the oil seal edge is higher than oil chamber and oil-returning slot.
Secondly, the constructed three-dimensional model is meshed by ICEM CFD software.
The temperature distribution law of the interstitial oil film on the hydrostatic center rack is obtained through the simulation.
The constructed three-dimensional model is imported to ICEM CFD software, and tessellates the mesh near the oil seal edge.

Gas-liquid hydrodynamics was estimated based on CFD results.
The simulation results have been compared and analyzed by isosurfaces, volume fractions, velocity graphs, torques and flow analysis calculations.
Within CFD model, both indexes and shear rate range were used to define the xanthan broth properties.
The gas bubble distribution obtained from MUSIG simulation is shown in Fig. 5 contour plots.
V Ranade, “CFD Simulation of Gas-Liquid Flows in a Reactor Stirred by Dual Rushton Turbines,” Int.

Research On The Effect Of Natural Ventilation On Buses In Summer Based On CFD Numerical Simulation Method Bao LIN 1, a, Xueting WANG 1,a and Xiao HU 2,a 1Department of municipal and environmental engineering, Shenyang Jianzhu University, Shenyang, Liaoning, China,110168 2China Resources Gas Group Ltd, Jinan, Shandong, China axuew.ting@hotmail.com Keywords: city buses; natural ventilation; vehicle velocity; roof openings; interior thermal comfort; the whole-domain approach Abstract.
Based on CFD numerical simulation, with a whole-domain approach, this paper predicts air flow and thermal comfort in naturally ventilated bus.
This paper, with the help of CFD simulation software, simulates the bus interior temperature and velocity under different vehicle velocity and open condition of roof openings.
Table 1 Simulation cases Outdoor air temperature[˚C] Vehicle velocity [km/h] The state of bus roof openings Side window Case1 31 45 close Maximum open Case2 31 45 open Case3 31 25 close Case4 31 25 open Results of the Simulation and Analysis Thermal Environment in different parts of the bus.
This part focuses on the simulation results based on different open condition of roof openings.

Introduction There are three commonly methods to study tunnel fire ventilation: model test, actual fire simulation by abandoned tunnel and numerical simulation by CFD (Computational Fluid Dynamics) [1], in order to get the distribution of temperature, pressure and velocity.
CFD numerical simulation technique is widely used in tunnel fire ventilation study currently, which has the advantages of reducing the workload of the ground experiments, shorting the development cycle, saving experimental costs and so on, and its accuracy can be compared with the model test results [3].
CFD technology can visually simulate tunnel air flow velocity, temperature, pressure and other physical quantities, and the simulation results play a reference role on the selection of tunnel fire ventilation solutions.
CFD simulation of fire smoke behavior with transverse ventilation-comparison with model tests. 10th Intenrarsonal symposium on the Aerodynamics &Ventilation of Vehicle Tunnels, 2000
CFD simulations of a tunnel fire-Part Ⅰ[J].

Simulation of Friction Stir Processing with internally cooled tool A.N.
In this work, friction stir processing of AZ31B Mg with an internally cooled FSP tool is simulated by a three-dimensional CFD model.
Theory CFD multi-physics finite volume-based software STAR-CCM+ was used in the simulation.
However, the stresses generated in the tool domain are not estimated in this work as it is completely based on CFD method.
(b) internally cooled tool Summary and conclusions In this work, FSP with internally cooled tool was modeled using CFD analysis.