scholarly journals Erratum to: Unsteady RANS simulation of wind flow around a building shape obstacle

2021 ◽  
Author(s):  
Sheikh Hassan ◽  
Md. Mamun Molla ◽  
Preetom Nag ◽  
Nasrin Akhter ◽  
Amirul Khan
Keyword(s):  
Wind Flow ◽  
Rans Simulation ◽  
Building Shape ◽  
Unsteady Rans

Unsteady RANS simulation of wind flow around a building shape obstacle

2021 ◽  
Author(s):  
Sheikh Hassan ◽  
Md. Mamun Molla ◽  
Preetam Nag ◽  
Nasrin Akter ◽  
Amirul Khan
Keyword(s):  
Wind Flow ◽  
Rans Simulation ◽  
Building Shape ◽  
Unsteady Rans

Unsteady RANS simulation of OECD-TAMU cold-leg mixing benchmark

2021 ◽  
Vol 372 ◽  
pp. 110978
Author(s):  
Mubashir Hassan ◽  
Jinbiao Xiong ◽  
Xu Cheng
Keyword(s):  
Rans Simulation ◽  
Unsteady Rans

Unsteady RANS simulation of a surface piercing propeller in oblique flow

2016 ◽  
Vol 56 ◽  
pp. 79-91 ◽  
Author(s):  
Siamak Alimirzazadeh ◽  
Saeed Zabihzade Roshan ◽  
Mohammad Saeed Seif
Keyword(s):  
Rans Simulation ◽  
Oblique Flow ◽  
Unsteady Rans ◽  
Surface Piercing Propeller

Unsteady-RANS simulation of conjugate heat transfer in a cavity with a vertical semitransparent wall

2015 ◽  
Vol 117 ◽  
pp. 183-195 ◽  
Author(s):  
F. Noh-Pat ◽  
J. Xamán ◽  
G. Álvarez ◽  
M. Gijón-Rivera ◽  
I. Hernández-Pérez ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Conjugate Heat Transfer ◽  
Rans Simulation ◽  
Unsteady Rans

Unsteady RANS simulation of the ship forward speed diffraction problem

2006 ◽  
Vol 35 (6) ◽  
pp. 545-570 ◽  
Author(s):  
Pablo M. Carrica ◽  
Robert V. Wilson ◽  
Fred Stern
Keyword(s):  
Diffraction Problem ◽  
Forward Speed ◽  
Rans Simulation ◽  
Unsteady Rans

scholarly journals Evaluation of Wind Flow Characteristics by RANS-Based Numerical Site Calibration (NSC) Method with Met-Tower Measurements and Its Application to a Complex Terrain

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5121 ◽  
Author(s):  
Jae-ho Jeong ◽  
Kwangtae Ha
Keyword(s):  
High Resolution ◽  
Wind Turbine ◽  
Complex Terrain ◽  
Cfd Simulation ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Vortical Flow ◽  
Wind Flow ◽  
Rans Simulation ◽  
Resolution Scheme

The performance of wind turbines is not only dependent on the wind turbine design itself, but is also dependent on the accurate assessment of wind resources at the installation site. In this paper, the numerical site calibration (NSC) method using three-dimensional Reynolds-averaged Navier–Stokes (RANS) simulation was proposed to accurately forecast the wind flow characteristics of wind turbine sites with complex terrains, namely Methil in Scotland, and Haenam in South Korea. From NSC at the Methil and Haenam sites, it was shown that the complicated and vortical flow fields around hills and valleys were captured using the three-dimensional RANS CFD simulation in Ansys CFX software based on a high-resolution scheme with a renormalization group (RNG)-based k-ε turbulence model. It was also shown that topographically induced wind profile and turbulence intensity over a local-scale complex terrain are remarkably dominated by flow separation after passing hills. It was concluded that the proposed NSC method using three-dimensional RANS simulation with a high-resolution scheme was an economically useful method for evaluating wind flow characteristics numerically to assess wind turbine sites with complex terrains and designing the wind farm layout.

A Method for Conjugate Heat Transfer With Unsteady RANS Simulation

2014 ◽  
Author(s):  
Takashi Yamane ◽  
Yuhi Tanaka
Keyword(s):  
Heat Transfer ◽  
Time Scale ◽  
Thermal Conduction ◽  
Conjugate Heat Transfer ◽  
Turbulence Modeling ◽  
Flow Simulation ◽  
Turbulence Models ◽  
Solid Materials ◽  
Rans Simulation ◽  
Unsteady Rans

The conjugate heat transfer simulation is expected to simulate precise temperature distributions of turbine cooling structures and contribute to the reduction of cooling air usage. This method has mainly been used to predict steady state temperature because of the large difference of time scale between RANS flow simulation and thermal conduction in solid materials, thus the accuracy of temperature estimation depends on the modeling of the turbulence. Despite many efforts to improve turbulence models, an inherent limitation of RANS and turbulence modeling and the necessity of unsteady simulation for better accuracy in heat transfer simulations have been pointed out. The aim of this study is to combine the unsteady RANS simulation with the steady thermal conduction of solid materials. The “Time Smoothing” method was introduced to compensate the large time scale difference between fluid and solid, then the effectiveness of the method was confirmed through conjugate heat transfer simulations around a pipe shape object where strong flow unsteadiness prevails.

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