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The numerical analysis was performed using Computational Fluid Dynamics (CFD) with Autodesk CFD software.
Software and computational resources The collector simulations were performed using Autodesk® CFD, a commercial software with an academic license, which has shown good agreement with experimental data in other CFD studies [43-45].
Their collector simulations were reproduced to determine the error associated with using Autodesk CFD to simulate the operation of flat plate collectors of this type.
Table 5 summarizes the results and the associated error obtained with the Autodesk CFD simulation.
Bhardwaj, A review on the simulation/CFD based studies on the thermal augmentation of flat plate solar collectors.

Study on inner vortex in a hydrocyclone through numerical simulation ZHUO-LUN CEN 1,a, JI-GANG ZHAO 1,b and BEN-XIAN SHEN 1,c 1 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, CHINA acenzhuolun@hotmail.com, bzjg@ecust.edu.cn (corresponding author), csbx@ecust.edu.cn Keywords: Hydrocyclone, CFD, Fluent, Inner vortex Abstract.
This work presented a computational fluid dynamics (CFD) simulation to predict and to evaluate the effects of inlet velocity and the diameter of overflow tube on the inner vortex.
The calculation was carried out using commercial CFD code Ansys Fluent 14.0.
The introduction of numerical simulation tool CFD (Computational Fluid Dynamics) can provide a better understanding of the rotational and high-turbulent flow in the interior of hydrocyclone2.
The entire geometry was meshed by sweep method of structural hexahedrons, which is accessible to faster and more accurate results in CFD.

According to the CFD numerical simulation of hydraulic turbine internal flow and simulation calculation of vortex and cavitation of draft tube, and in the three dimensional modeling and analysis of the draft tube elbow is found that commonly modeling methods are tedious process, there is more deviations, not conducive to modify the part size and flow over a smooth.
Introduction The internal flow in draft tube of CFD numerical simulation, the degree of smoothing of the flow surface can not only greatly reduce the resistance of fluid motion, but also help to improve the accuracy of calculation, the more real and close to reality, to improve the simulation authenticity and accuracy, improve the calculation value[1].
With the rapid development of computational fluid dynamics (CFD), the research of pressure fluctuation on the draft tube has been more and more deeply in the domestic and foreign; the numerical simulation method is also increasing.
The projective modeling overcome the problems of the two traditional methods, and improve the precision of CFD numerical simulation and obtain higher accuracy requirements
(2) When CFD simulation, the modeling method proposed in this paper without significantly vortex with eccentric.

This study presents consisted in to simulate through computational fluid dynamics (CFD) package the operation of the Lapple cyclone.
If numerical simulations are conducted the immediate need for validation arises if the results are to be of practical use [3].
CFD is often perceived as a virtual fluids laboratory where experiments can be performed on the computer, but numerical simullation actually holds many advantages over its traditional counterpart, including: speed, cost, completeness of information, and simulation of all operating conditions.
The Yield of Pressure showed in the Fig.6, presents layer defined of the pressure in the cyclone, with maximum in the wall and minimum in the axis. 5 - Conclusions The relevant variables in the study of cyclones through the simulations using the techniques of Computational Fluid Dynamics (CFD) are compared to the experimental data of the literature [8] showing a good agreement.
The CFD techniques are a reliable and relatively inexpensive method of examining the effects of design changes on sampler performance of cyclone.

In the past several decades, with the progress of computational fluid dynamics (CFD) and the development of computer technology, flow simulations based on the Euler/Navier–Stokes (N–S) equations become more and more capable of modeling non-linear and viscous effects more accurately.
In this paper, time marching analysis based on CFD-CSD method for a wing is used to capture the flutter boundary, in these simulations, the structure is given an initial velocity and the subsequent time evolution of the response is calculated to see whether it grows or decays.
Numerical Method Cfd Model and Its Solutions.
In the CFD numerical simulating, the governing equations are Navier-Stokes equations:
Simulation then proceeds to the next time step.

Numerical Simulation Study of the Influence of Ceiling Materials to Roof Radiation Heat Exchange Songtao Hu, Feng Qi , Teng Xie,Xinxin Wang,Gang Wang and Guodan Liu Institute of Environmental&Municipal Engineering, Qingdao Technological University, Qingdao, 266033, China E-mail: qfsummit@163.com Keywords: CFD numerical simulation, Roof radiation heat exchange, Ceiling materials, Thermal physical properties Preface Abstract.
This article focuses on the study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.
Therefore, we select three kinds of ceiling materials: fiberboard, gypsum board and aluminum alloy plate, which are usually used in interior design, to study of the influence of ceiling materials to roof radiation heat exchange by CFD numerical simulation, which provides a theoretical basis for the choice of ceiling materials from the perspective of thermal properties.
The diagram of physical model Simulation results and their analysis C.
Radiative cooling calculation method based on the simulation of the ceiling. 2010 National HVAC Annual Conference

Stimulation parameters selection in CFD Parameter Value Kinematic viscosity 100mm2/s Height of oil 180mm Moving paddle rotational speed 300rpm The simulation results of viscous dissipation rate show in Fig.3, presented by viscous dissipation clouds.
The simulation and experimental results show consistent heating law.
CFD simulation can be used as a new means of stirring heating device design and research.
Simulation and Experiment Study of Flow Field and Dynamic Performance in Stirred Reactor [D].
FLUENT fluid engineering simulation and application examples [M].

The default mesh size was used to begin the simulation.
This turbulence model is regarded as one of the most significant among turbulence models, and it is widely utilized in dynamic fluids (CFD), especially in simulation models and for turbulence problem-solving.
Kumawat, Modelling and simulation of an axial fan using CFD, Int.
Bartaria, CFD modeling and simulation of an axial fan for application in an air-cooled heat exchanger, Int.
ASME (2022). https://doi.org/10.1115/1.4054919 [17] Analysis and simulation of axial fan using CFD, ResearchPublish.com (2022). https://doi.org/10.13140/RG.2.2.36565.17120 [18] S.M.

The effects of varying tip gaps are studied using CFD simulations for overall pressure rise and flow physics of the tip flow at the design point and near the peak pressure point.
The effect of varying tip gaps are studied using CFD simulations for overall pressure rise and flow physics of the tip flow at the design point and near the peak pressure point.
A quick comparison between CFD results and rig test with 3% tip clearance rotor was carried out to establish a reasonable basis for detailed CFD analysis.
Fig. 1 Rotor performance comparison between rig test data and CFD simulations CFD Studies The generation of the rotor blade model and grid has been done using the software ANSYS Turbogrid© while the simulations were carried out using the commercial package ANSYS CFX©.
A mesh size of 3.1 million was chosen for the simulations after a grid independence study.

Based on the analysis, the simulation result is qualitatively discussed referring to the factual conditions of the engine for validating the feasibility of analysis method.
The appropriate relationships of these stresses can be built by turbulent models, such as the standard model, which is widely used in engineering, is adopted in this paper; this model is a semi-empirical model of the two equations of the turbulent kinetic energy and the diffusion rate , the control equations are as follows: （2） where, represents the fluid’s density, represents the fluid’s dynamical viscosity coefficient, represents the turbulent viscosity coefficient, represents the turbulent kinetic energy created by the average velocity grads. 3 Interpolation method of CFD-CSD Because CSD and CFD mesh disaccord, CSD mesh is sparseness then CFD mesh, so you must insert the CSD displacement of mesh node to CFD mesh node to make the data exchange.
Mathematical Simulation.
The MFX-ANSYS/CFX coupling platform is developed by the ANSYS Corporation to realize the coupling calculation between CFD and CSD.
Based on the analysis, the simulation result is qualitatively discussed referring to the factual conditions of the engine for validating the feasibility of analysis method.