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Journal articles on the topic 'SST k-ω turbulence model'

Author: Grafiati

Published: 24 June 2021

Last updated: 29 July 2025

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1

Linh, Luong Cao, and Mai Cao Tri. "Evaluating the performance of the RANS turbulence models for simulating wave propagation over a submerged breakwater using openfoam." Journal of Science and Technology in Civil Engineering (STCE) - HUCE 17, no. 1 (2023): 79–93. http://dx.doi.org/10.31814/stce.nuce2023-17(1)-07.

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The present work is to evaluate the performance of the RANS turbulence models for simulating regular wavepropagation over a submerged breakwater using the open-source Computational Fluid Dynamics (CFD) software OpenFOAM. The present numerical results of four turbulence models (k-ε model, k-ω SST model, buoyancy-modified k-ω SST model, and stabilized k-ω SST model) are compared with published experimental data for free surface elevations and velocities at gauges. Moreover, the results of the turbulent kinetic energy (TKE) are compared and assessed between the turbulence models. Results show tha

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2

Yang, Xianglong, and Lei Yang. "Numerical Study of Entropy Generation in Fully Developed Turbulent Circular Tube Flow Using an Elliptic Blending Turbulence Model." Entropy 24, no. 2 (2022): 295. http://dx.doi.org/10.3390/e24020295.

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As computational fluid dynamics (CFD) advances, entropy generation minimization based on CFD becomes attractive for optimizing complex heat-transfer systems. This optimization depends on the accuracy of CFD results, such that accurate turbulence models, such as elliptic relaxation or elliptic blending turbulence models, become important. The performance of a previously developed elliptic blending turbulence model (the SST k–ω–φ–α model) to predict the rate of entropy generation in the fully developed turbulent circular tube flow with constant heat flux was studied to provide some guidelines fo

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3

Shen, De Zhang, He Zhang, and Hao Jie Li. "Comparison of Two Two-Equation Turbulence Model Used for the Numerical Simulation of Underwater Ammunition Fuze Turbine Flow Field." Advanced Materials Research 591-593 (November 2012): 1968–72. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.1968.

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To figure out the problem of turbulence simulation of underwater ammunition fuze turbine numerical simulation, respectively, realizable k-ε turbulence model and SST k-ω turbulence model are used for two-phase flow numerical simulation of the turbine rotation. The analysis compared the calculation results of the two turbulence models. The results showed that: the cavitation scale obtained from realizable k-ε turbulence model is shorter than that of SST k-ω turbulence model; turbine surface pressure distribution trends are similar of this two model, the results of realizable k-ε turbulence model

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4

Genç, M. S. "Numerical Simulation of Flow over a Thin Aerofoil at a High Reynolds Number Using a Transition Model." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 10 (2010): 2155–64. http://dx.doi.org/10.1243/09544062jmes2121.

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In this study, a prediction of the transition and stall characteristics of an NACA64A006 thin-aerofoil was numerically simulated by FLUENT using k— kL—ω and k—ω shear-stress transport (SST) transition models, recently developed, and k—ω SST and k—ε turbulence models. Subsonic flow with free stream Mach number ( M∞) of 0.17 and the high Reynolds number ( Re) of 5.8×106 was considered at an angle of attack varying from 2° to 11°. However, the computed results were compared with the experiments of McCollough and Gault. Lift and pressure curves were accurately predicted using the k— kL—ω transitio

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5

Zhao, Haitao, Junwei Ye, Kaifang Wang, et al. "Selection of a Turbulence Model for Wave Evolution on a New Ecological Hollow Cube." Water 17, no. 8 (2025): 1149. https://doi.org/10.3390/w17081149.

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A suitable turbulence model is needed for numerical simulations to accurately simulate the wave evolution and hydrodynamic performance of the new ecological hollow cube. The new ecological hollow cube is an improvement upon traditional designs, as it can grow plants to dissipate wave energy. In this study, the open-source computational fluid dynamics (CFD) software OpenFOAM v2206 is used as the computational platform to analyze and evaluate the numerical results of four turbulence models, i.e., the standard k-ε, steady k-ω shear stress transfer (SST), buoyancy-corrected k-ω SST, and large eddy

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6

Yin, Yuan, Yangsen Li, Ruizong Lin, et al. "Research on turbulence model for simulation of wind flow in mountain areas of micro-topography." Journal of Physics: Conference Series 2441, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1742-6596/2441/1/012012.

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Abstract The accuracy of wind flow simulation in mountain area in micro-topography is related to discrete scheme, turbulence model and wall function. In this paper, the standard hill model is adopt to analyze the calculation accuracy of different turbulence models. Four turbulence models, including RNG k-ε, k-ω, SST k-ω and TSST k-ω, were used in the calculation, and were compared with the result of wind tunnel test. The calculation results with the second-order upwind scheme, the SST or TSST turbulence model and the scalable wall function are basically consistent with results of wind tunnel t

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7

Velásquez, Laura, Ainhoa Rubio-Clemente, and Edwin Chica. "Numerical and Experimental Analysis of Vortex Profiles in Gravitational Water Vortex Hydraulic Turbines." Energies 17, no. 14 (2024): 3543. http://dx.doi.org/10.3390/en17143543.

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This work compared the suitability of the k-ϵ standard, k-ϵ RNG, k-ω SST, and k-ω standard turbulence models for simulating a gravitational water vortex hydraulic turbine using ANSYS Fluent. This study revealed significant discrepancies between the models, particularly in predicting vortex circulation. While the k-ϵ RNG and standard k-ω models maintained relatively constant circulation values, the k-ϵ standard model exhibited higher values, and the k-ω SST model showed irregular fluctuations. The mass flow rate stabilization also varied, with the k-ϵ RNG, k-ω SST, and k-ω standard models being

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Mahmudah, R. S. N., R. Widiatmono, D. Darmawan, M. R. H. Fikri, D. Sidek, and A. S. N. Hidayah. "Assessing Turbulence Model Performance in OpenFOAM for Natural Convection Simulations." Journal of Physics: Conference Series 2866, no. 1 (2024): 012031. http://dx.doi.org/10.1088/1742-6596/2866/1/012031.

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Abstract Natural convection processes are pivotal in various engineering applications, necessitating accurate and reliable computational fluid dynamics (CFD) models for their simulation. This study evaluates the efficacy of different turbulence models implemented in OpenFOAM for a natural convection scenario, aiming to identify the most suitable model for capturing complex thermal and fluid dynamic behaviors. We compared several turbulence models, including the k − ε, k − ω, and k − ω SST, using a benchmark thermal convection case. Our methodology involved setting up the simulations to reflect

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9

Teodosiu, Cătălin, Viorel Ilie, and Raluca Teodosiu. "Appropriate CFD Turbulence Model for Improving Indoor Air Quality of Ventilated Spaces." Mathematical Modelling in Civil Engineering 10, no. 4 (2014): 28–42. http://dx.doi.org/10.2478/mmce-2014-0020.

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Abstract Accurate assessment of air-flow in ventilated spaces is of major importance for achieving healthy and comfortable indoor environment conditions. The CFD (Computational Fluid Dynamics) technique is nowadays one of the most used approaches in order to improve the indoor air quality in ventilated environments. Nevertheless, CFD has still two main challenges: turbulence modeling and experimental validation. As a result, the objective of this study is to evaluate the performance of different turbulence models potentially appropriate for the prediction of indoor airflow. Accordingly, result

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10

Hien Le Tat, Nguyen Duy Anh, and Nguyen Thi Ngoc Hoa. "Numerical Investigate the Effect of Turbulence Models on the CFD Computation of Submarine Resistance." CFD Letters 16, no. 10 (2024): 126–39. http://dx.doi.org/10.37934/cfdl.16.10.126139.

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Up to now, there is no developed ‘universal’ turbulence model in CFD simulation, so employing an appropriate turbulence model is crucial for accurately predicting the hydrodynamics of a ship, especially for submarines. This study focuses on investigating the impact of turbulence models on the predicted results in frictional and pressure resistance components and flow features around the submarine at different ship velocities by the CFD method. Four various turbulence models consisting of the Reynolds Stress Model, realizable k-ε two-layer, standard k-ω, and SST k-ω turbulence models are invest

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11

Grecu, I. S., G. Dunca, D. M. Bucur, and M. J. Cervantes. "URANS numerical simulations of pulsating flows considering streamwise pressure gradient on asymmetric diffuser." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012087. http://dx.doi.org/10.1088/1755-1315/1079/1/012087.

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Abstract The paper focuses on implementing the wall model developed by Manhart, in Reynolds Averaged Navier - Stokes (RANS) turbulence models used in the field of Computational Fluid Dynamics (CFD). This wall model considers the influence of the streamwise pressure gradient in addition to the existing wall models used in the usual CFD codes. In the present work, two RANS numerical simulations are carried out using the k-ω Shear Stress Transport (SST) turbulence model on an asymmetric diffuser geometry. One numerical simulation is carried out using the implementation of the Manhart wall model i

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Barnes, Andrew, Daniel Marshall-Cross, and Ben Richard Hughes. "Validation and comparison of turbulence models for predicting wakes of vertical axis wind turbines." Journal of Ocean Engineering and Marine Energy 7, no. 4 (2021): 339–62. http://dx.doi.org/10.1007/s40722-021-00204-z.

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AbstractVertical axis wind turbine (VAWT) array design requires adequate modelling of the turbine wakes to model the flow throughout the array and, therefore, the power output of turbines in the array. This paper investigates how accurately different turbulence models using 2D computational fluid dynamics (CFD) simulations can estimate near and far wakes of VAWTs to determine an approach towards accurate modelling for array design. Three experiments from the literature are chosen as baselines for validation, with these experiments representing the near to far wake of the turbine. Five URANS tu

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Uzakov, G. N., V. A. Sednin, A. B. Safarov, R. A. Mamedov, and I. A. Khatamov. "CFD-Modeling of the Airfoil of the Blades of a Wind Power Plant with a Vertical Axis in the Ansys Fluent System." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 67, no. 2 (2024): 97–114. http://dx.doi.org/10.21122/1029-7448-2024-67-2-97-114.

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The article presents the results of research on modeling the DU-06-W-200 airfoil used in wind power plants with a vertical axis in the Ansys Fluent system, evaluating compatibility with experimental data and determining the optimal angle of attack. The DU-06-W-200 airfoil was simulated with angles of attack ranging from –15° to +15°, boundary conditions and input flow rate being of 15 m/s, operating temperature – of 23 °C, operating pressure – of 1·105 Pa, air flow rate – of 1.23 kg/m3 (airfoil chord length is of 1 m, dynamic viscosity of the air flow is 1.7894·10–5 kg/(m·s) and the type of tu

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14

Jurga, A. P., M. J. Janocha, G. Yin, K. E. T. Giljarhus, and M. C. Ong. "Validation and assessment of different RANS turbulence models for simulating turbulent flow through an orifice plate." IOP Conference Series: Materials Science and Engineering 1201, no. 1 (2021): 012019. http://dx.doi.org/10.1088/1757-899x/1201/1/012019.

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Abstract In the present study, numerical simulations using different Reynolds-Averaged Navier–Stokes (RANS) turbulence models are carried out to investigate the turbulent flow through the orifice plate at Reynolds number (Re) of 23000. The orifice thickness to pipe diameter ratio (t) and the orifice diameter to pipe diameter ratio (β) are fixed and equal to 0.1 and 0.5, respectively. The objective is to evaluate the behaviour of various RANS models with respect to the relevant flow parameters such as the pressure drop, velocity distributions and turbulence intensity profiles in the pipe by com

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15

Povilaitis, Mantas, and Justina Jaseliūnaitė. "Simulation of Hydrogen-Air-Diluents Mixture Combustion in an Acceleration Tube with FlameFoam Solver." Energies 14, no. 17 (2021): 5504. http://dx.doi.org/10.3390/en14175504.

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During a severe accident in a nuclear power plant, hydrogen can be generated, leading to risks of possible deflagration and containment integrity failure. To manage severe accidents, great experimental, analytical, and benchmarking efforts are being made to understand combustible gas distribution, deflagration, and detonation processes. In one of the benchmarks—SARNET H2—flame acceleration due to obstacle-induced turbulence was investigated in the ENACCEF facility. The turbulent combustion problem is overly complex because it involves coupling between fluid dynamics, mass/heat transfer, and ch

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16

Li, Yiqiao, Chao Niu, Shengqiang Shen, Xingsen Mu, and Liuyang Zhang. "Turbulence Model Comparative Study for Complex Phenomena in Supersonic Steam Ejectors with Double Choking Mode." Entropy 24, no. 9 (2022): 1215. http://dx.doi.org/10.3390/e24091215.

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Scholars usually ignore the non-equilibrium condensing effects in turbulence-model comparative studies on supersonic steam ejectors. In this study, a non-equilibrium condensation model considering real physical properties was coupled respectively with seven turbulence models. They are the k-ε Standard, k-ε RNG, k-ε Realizable, k-ω Standard, k-ω SST, Transition SST, and Linear Reynolds Stress Model. Simulation results were compared with the experiment results globally and locally. The complex flow phenomena in the steam ejector captured by different models, including shock waves, choking, non-e

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Kimunguyi, Kiliswa Josephs* Grace Wambui Gachigua &. Francis Kimani Gatheri. "A NUMERICAL INVESTIGATION OF TURBULENT NATURAL CONVECTION IN A 3-D ENCLOSURE USING K-ω SST MODEL AND SIMPLEC METHOD". INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 7, № 1 (2018): 66–77. https://doi.org/10.5281/zenodo.1135410.

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The objective of this study is to conduct a numerical investigation of turbulent natural convection in a 3-D cavity using the k-  SST model and the SIMPLEC method. The statistical-averaging process of the mass, momentum and energy governing  equations  introduces unknown turbulent correlations into the mean flow equations which represent the turbulent transport of momentum, heat and mass, namely Reynolds stress <em>(</em> <em>)</em> and heat flux <em>(</em> <em>),</em> which are modelled using k-  SST model. The Reynolds-Averaged Navier-stokes (RANS), energy and k-  SS

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18

Del Rio, A., E. Casartelli, L. Mangani, and D. Roos Launchbury. "Application of a Coupled Reynolds Stress Model to a Swirl-Driven Diffuser Flow." IOP Conference Series: Earth and Environmental Science 1079, no. 1 (2022): 012068. http://dx.doi.org/10.1088/1755-1315/1079/1/012068.

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Abstract Swirling flow is a dominant feature in a significant number of technical applications. Hydraulic turbines at part-load are strongly affected by the related vortex rope phenomenon. Its dynamic behavior has a negative impact on the operating performance and durability of the machine. CFD can be used to get additional insight in this complex phenomenon but requires a valid simulation model able to capture the relevant flow physics, which is driven by highly anisotropic turbulent structures. The simulation results are therefore strongly affected by the turbulence modeling. A swirl apparat

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19

Boertz, Hendrik, Albert Baars, Janusz T. Cieśliński, and Sławomir Smoleń. "Turbulence Model Evaluation for Numerical Modelling of Turbulent Flow and Heat Transfer of Nanofluids." Applied Mechanics and Materials 831 (April 2016): 165–80. http://dx.doi.org/10.4028/www.scientific.net/amm.831.165.

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In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid with particle volume concentrations ranging from 0% to 10%. A prior turbulence model evaluation of k-ε-, k-ω- and k-ω-SST-model revealed substantial deviations between

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20

Engdar, Ulf, Per Nilsson, and Jens Klingmann. "Investigation of Turbulence Models Applied to Premixed Combustion Using a Level-Set Flamelet Library Approach." Journal of Engineering for Gas Turbines and Power 126, no. 4 (2004): 701–7. http://dx.doi.org/10.1115/1.1771687.

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Most of the common modeling approaches to premixed combustion in engineering applications are either based on the assumption of infinitely fast chemistry or the flamelet assumption with simple chemistry. The level-set flamelet library approach (FLA) has shown great potential in predicting major species and heat release, as well as intermediate and minor species, where more simple models often fail. In this approach, the mean flame surface is tracked by a level-set equation. The flamelet libraries are generated by an external code, which employs a detailed chemical mechanism. However, a model f

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Niou, Slimane, Abdessalam Otmani, Azzeddine Dekhane, and Salaheddine Azzouz. "Digital Analysis of Common Turbulence Patterns in Centrifugal Pump Flow Simulation Based on COMSOL Multiphysics Software." International Journal of Heat and Technology 40, no. 3 (2022): 855–62. http://dx.doi.org/10.18280/ijht.400327.

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The present paper tackles the convergence and performance of three numerical turbulence models in the flow simulation. The benchmark analysis was performed using the COMSOL Multiphysics code, and the turbulence on a centrifugal water pump was generated numerically using the k−ε,k−ω, and k−ω SST models. However, the geometry was conducted on SolidWorks due to its complexity. First, the flow modeling was driven by solving the stationary Navier-Stokes equations. Then, the effects of the tested models, on the numerical CFD simulation, were examined. The analyzed results demonstrated that the best

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Adeel-Ur-Rehman, A., J. N. Theron, H. Kassem, B. Stoevesandt та J. Peinke. "Improved performance of k − ω SST turbulence model in predicting airfoil characteristics for a wide range of airfoil thicknesses". Journal of Physics: Conference Series 2767, № 2 (2024): 022064. http://dx.doi.org/10.1088/1742-6596/2767/2/022064.

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Abstract A variety of airfoils designed for wind turbine rotor blade applications were simulated with k − ω shear stress transport (SST) turbulence model in its standard form, the k − ω SST turbulence model with a modified a 1 constant (referred to as the a 1 method), the Spalart-Allmaras turbulence model, and the panel method XFoil. To assess their performance, the results of airfoil lift, drag, and coefficient of pressure were compared against available wind tunnel data, where available. The standard k −ω SST turbulence model is found to over-predict Reynolds shear stresses, delay the flow s

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Shaheed, Rawaa, Abdolmajid Mohammadian та Alaa Mohammed Shaheed. "Numerical Simulation of Turbulent Flow in River Bends and Confluences Using the k-ω SST Turbulence Model and Comparison with Standard and Realizable k-ε Models". Hydrology 12, № 6 (2025): 145. https://doi.org/10.3390/hydrology12060145.

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River bends and confluences are critical features in fluvial environments where complex flow patterns, including secondary currents, turbulence, and surface changes, strongly influence sediment transport, river morphology, and water quality. The accurate prediction of these flow characteristics is essential for hydraulic engineering applications. In this study, we present a numerical simulation of turbulent flow in river bends and confluences, with special consideration given to the dynamic interaction between free-surface variations and closed-surface constraints. The simulations were perform

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Amorim, Felipe Grossi L., Jean Helder M. Ribeiro, Marília Gabriela J. Vaz, and Ramon Molina Valle. "Sensitivity Analysis of the Air Flow inside a Single Cylinder Engine for Different Turbulence Models Using CFD." Advanced Materials Research 1016 (August 2014): 624–29. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.624.

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Theincrease of greenhouse gases emissions makes necessary to improve the comprehension of the Internal Combustion Engines operation. One of the factors that affect the combustion in these engines is the turbulence, since it can raise the quality of the fuel-air mixture inside the combustion chamber. However, when modeling internal combustion engines using CFD, the turbulence model choice is always a relevant problem. The present paper analyzes the results for three different turbulence models (k-ε Realizable, RNG k-ε and Menter k-ω SST) ina single-cylinder engine geometry, comparing numerical

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Mohamed, M. Arif, Y. Wu, and Martin Skote. "Assessment of Simple RANS Turbulence Models for Stall Delay Applications at Low Reynolds Number." Applied Mechanics and Materials 863 (February 2017): 260–65. http://dx.doi.org/10.4028/www.scientific.net/amm.863.260.

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This paper assesses the performance of three two-equation turbulence models viz. the SST k-ω, the RNG and realizable k-εfor the simulations of a rotating blade in a wind tunnel experiment where k, ε and ω are turbulent kinetic energy, dissipation rate and specific dissipation respectively. The experiments showed the stall-delay phenomenon at the inboard of the rotating blade at a Reynolds number of 4800. This trend of suction peaks was captured by all three turbulence models albeit not matching the experimental coefficient of pressure accurately. All three models also showed radial flow at the

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Deng, Yilin, Jian Feng, Fulai Wan, Xi Shen, and Bin Xu. "Evaluation of the Turbulence Model Influence on the Numerical Simulation of Cavitating Flow with Emphasis on Temperature Effect." Processes 8, no. 8 (2020): 997. http://dx.doi.org/10.3390/pr8080997.

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The aim of this paper is to investigate the influence of different turbulence models (k−ε, RNG k−ε, and SST k−ω) on the numerical simulation of cavitating flow in thermosensitive fluid. The filter-based model and density correction method were employed to correct the turbulent viscosity of the three turbulence models. Numerical results obtained were compared to experimental ones which were conducted on the NACA0015 hydrofoil at different temperatures. The applicability of the numerical solutions of different turbulence model was studied in detail. The modified RNG k−ε model has higher accuracy

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Matyushenko, A. A., та A. V. Garbaruk. "Non-linear correction for the k-ω SST turbulence model". Journal of Physics: Conference Series 929 (листопад 2017): 012102. http://dx.doi.org/10.1088/1742-6596/929/1/012102.

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Rahman, Md Mizanur, Xueting Zhang, K. Hasan, and Sheng Chen. "RANS Flow Computation around Transonic RAE2822 Airfoil with a New SST Turbulence Model." MIST INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY 12 (December 26, 2024): 23–27. https://doi.org/10.47981/j.mijst.12(02)2024.477(23-27).

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The solution to RANS (Reynolds-averaged Navier-Stokes) equations invokes a suitable framework for turbulence modelling. To account for turbulence and transition effects, a new SST (Shear Stress Transport) k-ω turbulence model is coupled with RANS to simulate the transonic flow passing an RAE2822 air foil. Three sets of experimental data of the super-critical RAE2822 air foil are employed to validate the new SST (NSST) closure. Computations are conducted for a limited range of Reynolds numbers with variable angle of attack. The NSST model has been found to replicate satisfactory results for lif

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Tahani, Mojtaba, Mehran Masdari, Hamidreza Eivazi, and Massoud Tatar. "Assessment of turbulence models for transonic oscillating airfoil." International Journal of Numerical Methods for Heat & Fluid Flow 27, no. 11 (2017): 2603–28. http://dx.doi.org/10.1108/hff-04-2016-0142.

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Purpose This paper aims to investigate numerical solution of transonic flow around NACA0012 airfoil under sinusoidal pitch oscillation. Accordingly, effects of the amplitude and frequency of oscillations on aerodynamic coefficients are evaluated and the efficiency of the turbulent models, K-ω shear-stress transport (SST), scale adaptive simulation (SAS) and delayed detached eddy simulation (DDES), in simulation of the nonlinear phenomena – i.e. the interaction between shock and boundary layer and the shock oscillations – is studied. Design/methodology/approach K-ω SST, SAS and DDES models are

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Wang, Le, Zhengyu Tian, Hang Yu, Ye Zhang, and Hua Li. "Comparative study on the performance of turbulence models in flow separation of large expansion ratio nozzle." Journal of Physics: Conference Series 2364, no. 1 (2022): 012035. http://dx.doi.org/10.1088/1742-6596/2364/1/012035.

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Abstract The asymmetry of flow separation inside the nozzle with large expansion ratio is the main factor for the generation of side-load in the engine, so the accurate prediction of the flow separation is of great significance. The turbulence model is the key to the prediction, but in different scenarios, the performance of the turbulence model can introduce huge uncertainties. In this paper, a typical thrust-optimized nozzle (VOLVO-S1) is simulated and analyzed for three widely used turbulence models: SST k - ω 、 RNG k - ε and Spalart-Allmaras model. The results show that all these models ca

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Ghofur, Abdul, Arifin, Erdina Arianti, A. Bisri, and Suwahyu. "Resistance on Catamaran Decommissioning Unit: A Comparison of Numerical Analysis (Two Turbulence Models) to Model Test Result." IOP Conference Series: Earth and Environmental Science 1166, no. 1 (2023): 012003. http://dx.doi.org/10.1088/1755-1315/1166/1/012003.

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Abstract A new concept design Catamaran Decommissioning Unit has been developed by Research Center for Hydrodynamics Technology Indonesia. The catamaran has a unique shape, however in order to achieve resilient and sustainable the decommissioning unit as it has a unique shape, resistance analysis both model testing and numerical calculation must be conducted. The resistance value from the numerical analysis needs to be validated with the results from model testing in the towing tank. A model of a catamaran unit with a scaling factor λ=36 was taken as the object of study. The model test was con

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Zhao, Minsheng, Decheng Wan, and Yangyang Gao. "Comparative Study of Different Turbulence Models for Cavitational Flows around NACA0012 Hydrofoil." Journal of Marine Science and Engineering 9, no. 7 (2021): 742. http://dx.doi.org/10.3390/jmse9070742.

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The present work focuses on the comparison of the numerical simulation of sheet/cloud cavitation with the Reynolds Average Navier-Stokes and Large Eddy Simulation(RANS and LES) methods around NACA0012 hydrofoil in water flow. Three kinds of turbulence models—SST k-ω, modified SST k-ω, and Smagorinsky’s model—were used in this paper. The unstable sheet cavity and periodic shedding of the sheet/cloud cavitation were predicted, and the simulation results, namelycavitation shape, shedding frequency, and the lift and the drag coefficients of those three turbulence models, were analyzed and compared

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Munazid, A., I. M. Ariana, and I. K. A. P. Utama. "The influence of time steps and turbulence model in numerical predicting total resistance on Japan Bulk Carrier with and without pre-duct." IOP Conference Series: Earth and Environmental Science 1423, no. 1 (2024): 012033. https://doi.org/10.1088/1755-1315/1423/1/012033.

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Abstract As a numerical fluid dynamic simulation method, Computational Fluid Dynamic (CFD) must guarantee the accuracy of the simulation results carried out, where the accuracy of the simulation results depends on: numerical method, grid generation, mesh independence, grid type, turbulence model, etc. This paper explains the influence of turbulence model and time step on the resistance prediction results of the Japan Bulk Carrier (JBC) ships, with CFD simulations using the ANSYS CFX software package. The model is simulated with several turbulence models including: k-Epsilon (k-ε), k-Omega (k-ω

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Wu, Jian Feng, Cai Hua Wang, and Yan Chao Zhao. "The Turbulent Flow Model Selection for Numerical Wind Tunnel Simulation of the Low Layer Double Slope Roof." Applied Mechanics and Materials 204-208 (October 2012): 4892–95. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.4892.

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Using the FLUENT software, this paper taking the current code for the design of building structures as the comparison standard, have numerical wind tunnel simulation of the wind the surface wind pressure on low layer double slope roof. It focuses on the analysis of the effects of turbulence model selection on the numerical simulation results, such as Spalart-Allmaras、Standard k −ε、RNG k −ε、Realizable k −ε、Standard k −ω、SST k −ω and RSM, to provide a basis for the reasonable selection of turbulence models.

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ZHANG, XIANG-HONG, YI-ZAO WU, and JIANG-FENG WANG. "TURBULENCE MODELS FOR ACCURATE AEROTHERMAL PREDICTION IN HYPERSONIC FLOWS." Modern Physics Letters B 24, no. 13 (2010): 1345–48. http://dx.doi.org/10.1142/s021798491002358x.

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Accurate description of the aerodynamic and aerothermal environment is crucial to the integrated design and optimization for high performance hypersonic vehicles. In the simulation of aerothermal environment, the effect of viscosity is crucial. The turbulence modeling remains a major source of uncertainty in the computational prediction of aerodynamic forces and heating. In this paper, three turbulent models were studied: the one-equation eddy viscosity transport model of Spalart-Allmaras, the Wilcox k -ω model and the Menter SST model. For the k -ω model and SST model, the compressibility cor

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Yang, Xianglong, and Lei Yang. "An Elliptic Blending Turbulence Model-Based Scale-Adaptive Simulation Model Applied to Fluid Flows Separated from Curved Surfaces." Applied Sciences 12, no. 4 (2022): 2058. http://dx.doi.org/10.3390/app12042058.

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On the basis of a previously developed elliptic blending turbulence model (SST–k–ω–φ–α model), a scale-adaptive simulation (SAS) model is developed by following Menter and Egorov’s SAS concept. An SAS source term, which is related to the ratio of the modeled turbulence scale to the von Kármán length scale, is introduced into the corresponding length-scale determining equation. The major motivation of this study is that the conventional unsteady Reynolds-averaged Navier–Stokes (URANS) models provide only large-scale unsteadiness. The introduction of the SAS term allows the proposed SAS model to

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Pahlavanzadeh, Mohammadsadegh, Włodzimierz Wróblewski, and Krzysztof Rusin. "On the Flow in the Gap between Corotating Disks of Tesla Turbine with Different Supply Configurations: A Numerical Study." Energies 17, no. 17 (2024): 4472. http://dx.doi.org/10.3390/en17174472.

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Momentum diffusion and kinetic energy transfer in turbomachinery have always been significant issues, with a considerable impact on the performance of the bladeless Tesla turbine. This radial turbine shows high potential for various energy applications, such as Organic Rankine Cycle or combined heat and power systems. Analyzing the flow inside the gap between the corotating disks of the Tesla turbine presents challenges due to several factors, including submillimeter length scales, variations in flow cross-section, interactions of body forces arising from rotation with turbulence, interactions

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Ramadhan Al-Obaidi, Ahmed. "Effects of Different Turbulence Models on Three-Dimensional Unsteady Cavitating Flows in the Centrifugal Pump and Performance Prediction." International Journal of Nonlinear Sciences and Numerical Simulation 20, no. 3-4 (2019): 487–509. http://dx.doi.org/10.1515/ijnsns-2018-0336.

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AbstractIn centrifugal pumps, it is important to select appropriate turbulence model for the numerical simulation in order to obtain reliable and accurate results. In this work, ten turbulence models in 3-D transient simulation for the centrifugal pump are chosen and compared. The pump performance is validated with experimental results. The numerical results reveal that the SST turbulence model was closer to the experimental results in predicting head. In addition, the pressure variation trend for the ten models is very similar which increases and then decreases from the inlet to outlet of the

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LIU, JINTAO, SHUHONG LIU, YULIN WU, YUEKUN SUN, and ZHIGANG ZUO. "PREDICTION OF "S" CHARACTERISTICS OF A PUMP-TURBINE WITH SMALL OPENING BASED ON V2F MODEL." International Journal of Modern Physics: Conference Series 19 (January 2012): 417–23. http://dx.doi.org/10.1142/s2010194512009014.

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The characteristic of a pump-turbine during the whole starting or stopping period couldn't be calculated accurately by CFD method and most of turbulence models were found inaccurate in the calculation of small opening condition, so a proper turbulence model was needed for the further study of pump-turbine. V2F model which was valid to the solid wall and SST k-ω model were used to calculate the pump-turbine with two openings that one was a small opening and the other was large opening. Results showed that V2F model can be used to simulate characteristics of pump-turbine in the whole opening ran

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Didier, Eric, and Paulo R. F. Teixeira. "Validation and Comparisons of Methodologies Implemented in a RANS-VoF Numerical Model for Applications to Coastal Structures." Journal of Marine Science and Engineering 10, no. 9 (2022): 1298. http://dx.doi.org/10.3390/jmse10091298.

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Methodologies to be used in numerical models based on Reynolds-averaged Navier–Stokes (RANS) equations and the volume of fluid (VoF) to deal with waves over coastal structures, which involve wave breaking and overtopping and porous structures, are shown in this manuscript. Two turbulence models, k-ε NLS (non-linear Reynolds stress tensor) and k-ε SCM (stabilized closure model), that are used to avoid the growth of the eddy viscosity, are implemented in the FLUENT® numerical model. Additionally, equations of momentum and turbulence models are adapted to simulate porous media of coastal structur

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Saru, Muhsine, Hıfzı Arda Erşan, and Erhan Pulat. "The Effect of Turbulent Intensity on Friction Coefficient in Boundary-Layer Transitional Flat Plate Flow." Applied Sciences 15, no. 11 (2025): 5852. https://doi.org/10.3390/app15115852.

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In this study, the effect of inlet-turbulence intensity on the friction coefficient for the transitional boundary layer has been investigated computationally. For this purpose, two equation turbulence models of Std. k-ε, RNG k-ε, Std. k-ω, and SST k-ω have been compared with the Gamma–Theta (GT) transitional model, and it has been found that the Gamma–Theta model is the most consistent model with the experimental values of the ERCOFTAC T3A test case. Then, the effect of inlet-turbulence intensity on the friction coefficient has been computed by using this Gamma–Theta model. The transition from

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Li, Xianli, Siniša Krajnovic, and Dan Zhou. "Numerical Study of the Unsteady Aerodynamic Performance of Two Maglev Trains Passing Each Other in Open Air Using Different Turbulence Models." Applied Sciences 11, no. 24 (2021): 11894. http://dx.doi.org/10.3390/app112411894.

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The strong change in the flow fields around two maglev trains (MTs) passing each other in open air may affect their manoeuvrability and passengers’ comfort. In this study, we evaluated the aerodynamic performance of two MTs passing each other via shear stress transport (SST) k–ω model and improved delayed detached eddy simulations based on the Spalart–Allmaras model (SA−IDDES) and the SST k–ω model (SST−IDDES). The accuracy of the numerical simulation method was verified using experimental data acquired from a moving model test. The results showed that the difference in the amplitude of the tr

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Burda, R., P. Rudolf, R. Zeman, and M. Balko. "CFD investigation on the effect of turbulence models on pressure fluctuations in Venturi nozzle." IOP Conference Series: Earth and Environmental Science 1483, no. 1 (2025): 012009. https://doi.org/10.1088/1755-1315/1483/1/012009.

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Abstract Following paper investigates the pressure waves and the dynamics of the vapor shedding mechanism in a converging-diverging Venturi nozzle with the use of Computational Fluid Dynamics (CFD). The study investigates the impact of various turbulence models, providing insights into the accuracy and reliability of different models in predicting vapor shedding mechanisms and resulting pressure fluctuations. The Shear Stress Transport (SST) k-ω, SST k-ω with modified turbulent viscosity and Stress-blended eddy simulation (SBES) were analysed. Also, to accurately capture the resulting pressure

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Cheban, Egor Yu, and Andrey N. Luchkov. "Numerical simulation of compound wings wind tunnel test for wig effect vehicle." Russian Journal of Water Transport, no. 75 (June 19, 2023): 108–17. http://dx.doi.org/10.37890/jwt.vi75.358.

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This paper presents the comparison of numerical simulation results and wind tunnel experiment for compound WIG's wing. Numerical simulation was performed in the ANSYS Fluent software. The choice of the turbulence model and the computational mesh parameters, including the resolution of the boundary layer, are substantiated. Comparison of the results of the experiment and numerical simulation showed good convergence for middle density mesh about 7 million cells and first layer height 0.0001 m. Additional study for k-ε realizable and k-ω SST turbulence models was done. Its result founded much eff

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Kim, Jun Song, Donghae Baek, and Inhwan Park. "Evaluating the Impact of Turbulence Closure Models on Solute Transport Simulations in Meandering Open Channels." Applied Sciences 10, no. 8 (2020): 2769. http://dx.doi.org/10.3390/app10082769.

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River meanders form complex 3D flow patterns, including secondary flows and flow separation. In particular, the flow separation traps solutes and delays their transport via storage effects associated with recirculating flows. The simulation of the separated flows highly relies in the performance of turbulence models. Thus, these closure schemes can control dispersion behaviors simulated in rivers. This study performs 3D simulations to quantify the impact of the turbulence models on solute transport simulations in channels under different sinuosity conditions. The 3D Reynolds-averaged Navier-St

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Wu, Guohong, Xiangyu Duan, Jianghui Zhu, Xiaoqin Li, Xuelin Tang, and Hui Gao. "Investigations of hydraulic transient flows in pressurized pipeline based on 1D traditional and 3D weakly compressible models." Journal of Hydroinformatics 23, no. 2 (2021): 231–48. http://dx.doi.org/10.2166/hydro.2021.134.

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Abstract Transient flow characteristics and dissipation mechanism in pressurized pipeline were investigated based on 1D friction models and 3D turbulence models, where the pressure–density model was combined into the 3D continuity equation allowing for the elasticity of the fluid and the pipes. The applicability of 3D realizable k–ε and 3D SST (shear stress transport) k–ω turbulence models was verified with comparison to 1D traditional water hammer models and the experimental data for fast closing of the valve in the reservoir–pipe–valve system. The valve closure rule was instantaneously carri

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Owolabi, Jibola, Khawaja Hassan, and Amar Aganovic. "Comparative Evaluation of Four RANS Turbulence Models for Aerosol Dispersion from a Cough." E3S Web of Conferences 396 (2023): 01072. http://dx.doi.org/10.1051/e3sconf/202339601072.

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The study of aerosol dispersion in indoor environments is essential to understanding and mitigating airborne virus transmission, such as SARS-CoV-2. Computational Fluid Dynamics (CFD) has emerged as a valuable tool for investigating aerosol dispersion, providing an alternative to costly experimental methods. In this study, we investigated the performance of four (4) Reynolds-averaged Navier-Stokes (RANS) turbulence models in predicting aerosol dispersion from a human body coughing in a small, ventilated indoor environment. We compared the Standard, RNG, Realizable k-ϵ models and the SST k- ω m

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MAŚLANKA, Wojciech, Stanisław KACHEL, and Michał FRANT. "Studying the influence of the turbulence model on the aerodynamic characteristics of a cruise missile model." Journal of Konbin 54, no. 3 (2024): 1–13. http://dx.doi.org/10.5604/01.3001.0054.7679.

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The article presents the study of the turbulence model’s influence on aerodynamic characteristics of a cruise missile model obtained during numerical calculations conducted using ANSYS Fluent Release 2023R1 software. Three turbulence models (i.e. Spalart-Allmaras, realizable k-ε and SST k-ω), as well as three computational meshes with a different refinement in a boundary layer region, were investigated. The results were analyzed and compared to characteristics obtained experimentally in the low-speed aerodynamic tunnel at the Military University of Technology (Warsaw, Poland).

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Nouhaila, Ouyoussef, Moustabchir Hassane, Maria Luminita Scutaru, and Liviu Jelenschi. "On the Accuracy of Turbulence Model Simulations of the Exhaust Manifold." Applied Sciences 14, no. 12 (2024): 5262. http://dx.doi.org/10.3390/app14125262.

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This study investigating the accuracy of turbulence model simulations of the exhaust manifold using computational fluid dynamics (CFD) carries significant implications. By modeling and analyzing the flow of emissions, we aim to identify areas of high stress and pressure, minimize the pressure drop, and maximize the flow of exhaust gases. This not only enhances engine performance, reduces emissions, and improves the durability of the manifold but also provides a unique opportunity to predict and analyze the flow and performance of the exhaust manifold, both quantitatively and qualitatively. Thi

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Kang, Qi, Jiapeng Gu, Xueyu Qi, et al. "Hydrodynamic Modeling of Oil–Water Stratified Smooth Two-Phase Turbulent Flow in Horizontal Circular Pipes." Energies 14, no. 16 (2021): 5201. http://dx.doi.org/10.3390/en14165201.

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In the petrochemical industry, multiphase flow, including oil–water two-phase stratified laminar flow, is more common and can be easily obtained through mathematical analysis. However, there is limited mathematical analytical model for the simulation of oil–water flow under turbulent flow. This paper introduces a two-dimensional (2D) numerical simulation method to investigate the pressure gradient, flow field, and oil–water interface height of a pipeline cross-section of horizontal tube in an oil–water stratified smooth flow. Three Reynolds average N–S equation models (k−ε, k−ω, SST k−ω) are i

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