Fast and Accurate Prediction of Vehicle Aerodynamics Using ANSYS Mosaic Mesh

Zore, Krishna; Caridi, Domenico; Lockley, Ian

doi:10.4271/2020-01-5011

Cited by 16 publications

(6 citation statements)

References 12 publications

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“…Polyhexacore mesh was used for more accurate results. [11,12] and uniform prism layer was applied to the building model shown in Figure 3. Using the y+ value of 200, the first cell height was calculated to be 0.01 mm.…”

Section: Methodology Model Geometry Computational Domain and Building Configurationmentioning

confidence: 99%

Investigation on the effect of opening position across an isolated building for wind-driven cross ventilation

Moey

Chan

Tai

et al. 2021

JMES

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This study investigates the effect of opening position on the indoor airflow of a natural ventilated isolated building model. Furthermore, the opening configuration which generate the highest ventilation is to be determined. Seven different opening configurations were considered by varying the opening position on the windward and leeward walls which include three cases of aligned openings and four non-aligned openings. Models with different opening position were simulated using Computational Fluid Dynamics (CFD) with 3D RANS turbulence model Shear Stress Transport (SST) k- ω. Simulation result indicates the indoor air velocity as well as pressure distribution highly depends on both inlet and outlet opening positioning. Different opening configuration influences the recirculation zone generated within the building model. Comparison shows openings located near the roof generate 6.52% higher ventilation rate compared to openings located near the ground. The study concludes that opening position holds a crucial role in affecting internal airflow pattern, air recirculation and ventilation rate for a natural cross ventilated building.

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Section: Methodology Model Geometry Computational Domain and Building Configurationmentioning

confidence: 99%

Investigation on the effect of opening position across an isolated building for wind-driven cross ventilation

Moey

Chan

Tai

et al. 2021

JMES

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“…Poly-hex core mesh is a novel meshing strategy to solve flow around complex geometries with greater accuracy and speed. This mesh employs polyhedral and hexahedral elements, providing an optimal combination of mesh elements [15]. Additionally, it allows a reduction of approximately 40% in terms of computational time [16].…”

Section: Numerical Analysismentioning

confidence: 99%

Runner optimal position in a gravitational water vortex hydraulic turbine with a spiral inlet channel and a conical basin

García¹,

Rubio-Clemente²,

Chica³

2024

RE&PQJ

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A gravitational water vortex hydraulic turbine (GWVHT) is a low head hydropower technology with a vertical runner for extracting energy from the water vortex. To determine the optimal position (h) of the runner for the hydropower plant efficiency to be increased, a runner in three different positions was compared using computational fluid dynamics (CFD). The position of the runner was a function of the basin height (H). The maximum efficiency (44.15%) was established when the runner was located at 60% of H. The angular velocity associated with the maximum efficiency was 14 rad/s.

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“…Mosaic mesh which is a Fluent Meshing technology accelerates the meshing process with a reduced face count, higher quality cells and efficient parallel scalability. Thanks to Mosaic-enabled poly-Hexcore meshing, engineers have been able to not only decrease the number of meshing cells by 15% but also reaching solution times that are often twice as fast; 45% faster while requiring 30% less memory, as the ANSYS company has officially announced (Zore et al 2020).…”

Section: Mosaic Meshmentioning

confidence: 99%

Unsteady Fluid Flow Analysis of Tongue Geometry in a Centrifugal Pump at Design and Off-design Conditions

2022

JAFM

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In the present work, the effects of modifying the tongue geometry of a centrifugal pump on pressure pulsations under the design and off-design conditions are carried out numerically by the unsteady analysis of fluid flow. Numerical modeling based on the Re-Normalization Group (RNG) k-ε turbulence model using a Mosaic mesh structure, a technology which can easily, quickly and formally connects any type of mesh for complex geometries and flow regimes, is applied to simulate the flow within the modeled pump, which is validated with the available experimental results. The flow is simulated through a commercial Computational Fluid Dynamics (CFD) software that solved Reynolds-Averaged Navier-Stokes (RANS) equations for a three-dimensional unsteady flow. In addition to choosing 𝑄 𝑑 (the design flow rate), 0.4𝑄 𝑑 and 1.2𝑄 𝑑 are also taken into account as the inlet flow rates. Besides, pressures of 101KPa and 13KPa are considered as additional inlet conditions for this investigation. This unsteady simulation employing different inlet conditions is used to investigate the impacts of various volute tongue angles on the pressure coefficient (𝑐 𝑝 ). Results indicate that, overall, by changing the angle from 40° to 85°, the value of the pressure coefficient at the pump outlet grows by about 10% where it also causes a rise in the amplitude of pressure fluctuations. By the same token, a decrement to the inlet flow rate up to 40% of the nominal value brings about the amplitude of pressure fluctuations at the pump outlet to be increased significantly.

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Fast and Accurate Prediction of Vehicle Aerodynamics Using ANSYS Mosaic Mesh

Cited by 16 publications

References 12 publications

Investigation on the effect of opening position across an isolated building for wind-driven cross ventilation

Investigation on the effect of opening position across an isolated building for wind-driven cross ventilation

Runner optimal position in a gravitational water vortex hydraulic turbine with a spiral inlet channel and a conical basin

Unsteady Fluid Flow Analysis of Tongue Geometry in a Centrifugal Pump at Design and Off-design Conditions

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