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The objective of this study is to predict the pressure gradient for gas-liquid bubbly flow along a vertical pipeline by using a Computational Fluid Dynamics (CFD) numerical simulation. The CFD simulation is compared with experimental data obtained from the literature, which involves a vertical pipe with a length of 1.52 m and an inner diameter of 11.68 mm. Empirical correlations available in the literature...
The vane support system (VSS) causes less distortion to the rear fuselage. It is an ideal support mechanism for large aircraft wind tunnel tests. Investigating on its support interference will contribute much to the conduction and development of VSS tests. This paper presents a numerical investigation on the support interference of VSS in high speed wind tunnel using Ty154 model. CFD results are compared...
To keep up with the growing energy demand, legacy aircooled data centers have begun to implement simple but effective energy efficiency strategies or best practices. Improving “air management”, optimizing the delivery of cool air and the collection of waste heat, are among these efficiency strategies. One of the most powerful tools for identifying energy wasteful practices is the application of the...
Due to the great damage to widely utilized flexible structures in ocean engineering, vortex-induced vibration (VIV) of such long flexible marine structures is still a hot issue that needs more theoretical research, and CFD techniques become gradually indispensable to study the VIV problem. In this paper, two-dimensional Reynolds-averaged Navier-Stokes (RANS) equations are adopted to investigate transverse...
Turbidity currents are major agents of sediment transport on land, in lakes, seas and oceans. Especially, they dominate volumetrically the most significant clastic accumulations in the deep sea, and can become many of the world's most important hydrocarbon reservoirs. Recently, 6 boreholes in western Qiongdongnan Basin, South China Sea, have revealed turbidity current deposits as good reservoirs....
Based on the physical numerical modeling of the flow field of the muffler in this paper, the author simulated the field by numerical method with Fluent and analyzed the effect which the internal flow field has on the performance of the muffler, which may be a credible guidance of the muffler structural design.
The reasonable flow field is the key problem in cathode design and the foundation of process stabiLity in electroChemical machining. In order to improve the efficiency of cathode designing and stabiLity of process in NC precision electroChemical machining of integer impeller, a method of applying Computational Fluid Dynamics (CFD) to aid designing flow field structure of cathode has been studied....
Tetrahedron Block (TB) is a commonly used material in river closure and dike protection engineering. A 3D hydrodynamic model, which is based on the commercial Computational Fluid Dynamics (CFD) code Fluent, is developed to predict velocity fields and drags of the single TB in flow with different free stream directions. The realizable k-ε model is adopted for turbulent closure of the Reynolds Averaged...
When wind turbine is running, and when the vortex is generated by the airfoil, it will generate a bound vortex with equal intensity with the vortex but by the opposite rotating direction around the wing. In this paper, by using the commercial software Fluent, the horizontal axis of the radius of 0.7m wind turbine's three-dimensional unsteady LES near wake were calculated, and the rotating efficiency...
The airflow field inside an air-conditioned highway sleeper coach was numerically investigated in this paper. The three-dimensional RNG k-ε turbulence model was to simulate indoor airflow field of the coach. The solar radiation and the heat exchange of the passengers were taken into account. The temperature field, the velocity distribution and the concentration distribution of carbon dioxide inside...
Spraying water into high temperature high pressure gas is a two phase flow. An Euler-Lagrange method was used to simulate the two phase flow with evaporation. The gas phase is simulated by solving the Navier-Stokes equations using RK(Runge-Kutta)-AUSM+(Advection Upstream Splitting Method) scheme. A particle trajectory model was used to represent the liquid phase. The source terms were added to the...
The technology of leak protection and leak control while drilling through physical methods can be successfully applied based on studying the annulus' behaviour of the whole down hole flow field. In this paper, the model of sealing down hole while drilling through physical methods which will be used for CFD simulation is eatablished through reasonable simplification. Then running numerical simulation...
A parallel technique is proposed to simulate flow fields with moving and deforming components or chemical non-equilibrium detonation based on MPI parallel environment. Two examples are provided to show the speed up of the parallel computation. The results indicate the parallel algorithm adopted is available and efficient.
In most of real-world applications, such as the case of heat stores, inlet is not kept at a constant temperature but it may vary with time during charging process. In this paper, a vertical water jet injected into a rectangular storage tank is measured experimentally and simulated numerically. Two cases of study are considered; one is a hot water jet with uniform inlet temperature (UIT) injected into...
This paper deals with the computational studies carried out on the aircraft swept wing with and without a simulated 5 minutes rime ice accretion at subsonic Mach number conditions. The aerodynamic performances changes of lift coefficients, drag coefficients and pressure coefficients were evaluated. The computations were carried out at Mach number 0.4758 with Reynolds number 5.61 × 106 conditions to...
The ventilation system is the basis to control the hazards in coal mine laneway. High reliability ventilation system can continuously convey fresh air into laneway , dilute the noxious gas, reduce disaster and ensure the mining productivity safe and effective. As we know that, many noxious gases in the coal mine laneway are compossible and their flowing states are complicated. In order to acquire...
In modern times, computer technology is used in various fields in the world. In this paper, CFD(computational fluid dynamics) was applied to build mathematical model to simulate continuous and dispersed multiphase flow in the experimental systems and an industrial electrolyzer. The Volume of Fluid model was used in the mathematical model for multi-phases. Cold model system of complex multiphase behavior...
Three-dimensional numerical simulation and analysis of the complicated unsteady compressible turbulence flow field in a large-scale gas control valve are performed, using computational fluid dynamics method. Flow visualization of three-dimensional flow field at different valve opening is presented. The velocity distribution and pressure loss of gas flow are studied. The flow behavior of eddy current...
Based on computational fluid dynamic (CFD) method, flow field analysis and structural optimization of a three-phase hydrocyclone were carried out by using FLUENT soft pack. By numerical simulation analysis on de-gas and de-sand functions of the three-phase hydrocyclone, effect of different geometric parameters on de-gas and de-sand functions is studied. It is found that the change of overflow tube...
Based on the Navier-Stokes equations for viscous, incompressible fluid and VOF method, the numerical experiment platform of oil containment by rigid floating boom in wave is established, utilizing the commercial CFD software FLUENT, and the waves are generated by defining the velocity of water particle on the inlet boundary. The volume of fluid (VOF) model is used to distinguish the three immiscible...
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