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Moreover, the drag reduction mechanism of herringbone riblets are also confirmed and exploited by CFD. 1.
Its efficiency of drag reduction and physical mechanism are clarified by tests in water tunnel and CFD analysis, respectively. 2.
Fig.5 shows the result of simulation and experiment, the result of simulation for different surfaces have a match with the experiment result.
Fig.4 Experiment results of drag reduction Fig.5 Effect of yaw angle on drag reduction (a) 0° (b) 30° (c) 60° Fig.6 CFD analysis results for yaw angle 0°, 30° and 60° herringbone riblet Summary.
Kim, Direct numerical simulation of turbulent flow over riblets, Journal of Fluid Mechanics. 255 (1993) 503-539

For heat-air-moisture simulation both mentioned are crucial, such as water transport in porous materials [1] and also the outdoor climate, e.g. wind-driven rain [2].
Also not all parameters are needed in weather forecasting, but in building simulation they would be.
Standard network cannot satisfy the need for climate data because of the global climate change, existence of the urban heat island [4] and advanced complex simulation model.
Prior to the decision about final placement of FMS was made a preliminary CFD simulation in CFD software OpenFOAM [6].
Results from CFD simulation [5] Initial Measurements Results of initial measurements, in winter period with extraordinary low freezing temperatures, are presented in the graphs in Fig. 6.

The study on this technique was conducted by Ruitao Peng et al.[13], who evaluated the effectiveness of these internal micro-channel structures in the turning tool using computational fluid dynamics (CFD) simulations[24].
Design and performance of an internal cooling turning tool with micro-channel structures Ruitao Peng, Haojian Jiang, Xinzi Tang, Xiaofang Huang, Ying Xu, Yunbo Hu A novel turning tool, designed with 2mm micro-channels using CFD simulations, demonstrated improved heat transfer efficiency, reducing cutting forces and temperatures compared to traditional flood cooling methods[13]. 2.
Biermann, “Experimental studies and CFD simulation of the internal cooling conditions when drilling Inconel 718,” Int J Mach Tools Manuf, 2016, doi: 10.1016/j.ijmachtools.2016.06.003
Li et al., “Design of an internally cooled turning tool based on topology optimization and CFD simulation,” The International Journal of Advanced Manufacturing Technology, 2017, doi: 10.1007/s00170-016-9804-9
Yeo, “A computational fluid dynamics (CFD) model for effective coolant application in deep hole gundrilling,” Int J Mach Tools Manuf, vol. 113, pp. 10–18, Feb. 2017, doi: 10.1016/J.IJMACHTOOLS.2016.11.008

Numerical Simulation of Flow Field in Cylinder of Gasoline Engine Jiao Yunjing; Lin Manqun; Wang Xuan; Wang Xueyan; Yan Xicheng Tianjin university Tianjin internal combustion engine institute（Tianjin ,300072） Email:jiaoyj1234567@163.com Keywords: numerical simulation; flow field; gasoline engine; combustion chamber with pent roof Abstract: By adopting CFD numerical simulation software, the transient state numerical simulation of engine is carried on.
With three-dimensional simulation software, aiming at the question that at high-speed the engine cannot work stably, the intake and compress stroke of gasoline engine with squish chamber was studied by numerical simulation.
The simulation was carried on in two work point that is the maximum power and the maximum torque.
Simulation of flow field and analysis 3.1 Simulation condition The simulation starts at the intake TDC(360°CA) and then ends at compression stroke TDC(720°CA).
In the initial setting of simulation, the area of simulation is divided into two areas that consist of combustion chamber and inlet port.

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.

A mathematical model for the simulation of the transport phenomena occurred in the anode of a typical fuel cell is presented here.
This approach has been numerically implemented and solved by using the finite volume method being applicable through the CFD-RC© commercial package.
Further to this simple modeling approach, a more detailed 2-D simulation has also been implemented for the same processes in order to overcome superficial assumptions and mathematical manipulations.
The finite volume method was used through the commercially available software package CFD-RC © for the solution of Eqs. (14)-(17) where the simulated domain was discretized by an unstructured grid.
Eleni Vakouftsi for her technical assistantship in CFD-RC© issues and Mr.

Muncii Boulevard, Technica University of Cluj-Napoca, Manufacturing Engineering Department, Cluj-Napoca, Romania anicolae.panc@tcm.utcluj.ro, bnicolae.balc@tcm.utcluj.ro, calina.luca@tcm.utcluj.ro Keywords: CFD simulation, die casting, heat transfer, investment casting Abstract.
For the numerical simulation of the casting process, several mathematical models have been developed and applied widely in the past years.
Filling up with liquid metal Considering that the liquid metal for casting is a viscous fluid, in the simulation stage occur a series of more complex problems in describing physical phenomena that accompany the flow process and filler a mold.
This is as it says [9],[10] a cell-centered finite volume methods, typical of most commercial CFD tools (Computational Fluid Dynamic tools), are computationally efficient, but can lead to convergence problems on meshes that feature cells with highly non-orthogonal shapes.
a) b) Fig. 3 Simulations results a) for flowing, b) for heat transfer The results of Comsol simulation for liquid metal flow in mold and cooling mold, it is presented in table 2.

Simulation results show that, water fluctuation and energy dissipation of round-flow emitter in vibration mode are better than that of constant pressure.
Application of CFD (Computer Fluid Dynamics) software FLUENT to study the relationship between flux and pressure under vibration pressure,using user-defined functions UDF to realize the boundary condition of vibration pressure, which can provide reference and basis for the selection of vibration parameters.
It is an assumption that there is no interaction between the variable factors.We design anorthogonal test table that each vibration mode consistsof 9 groups simulation program, as shown in Table 1.
Flow Field Numerical Simulation.3D model of the round-flow emitter is designed by means of Pro/E.
Fig.3:Outlet flow value of round-flow emitter under the sine vibration mode 1 simulation program.

Three-dimensional numerical simulations have been carried out for a steady and turbulent flow.
Shu et al. [6] have developed a method to obtain the thermal characteristics of the double skin façade system using computational fluid dynamics (CFD) techniques, and evaluated the energy performance of the DSF system.
The numerical simulations were carried out for a three-dimensional, steady and turbulent flow.
Numerical simulations were performed with ANSYS Fluent® CFD commercial software.
For all simulations performed in this study, converged solutions were achieved with residuals as low as 10-5 (or less) for all the governing equations.