TY - JOUR
T1 - The influence of time step setting on the CFD simulation result of vertical axis tidal current turbine
AU - Satrio, Dendy
AU - Ketut Aria Pria Utama, I.
AU - Mukhtasor,
N1 - Publisher Copyright:
© Universiti Malaysia Pahang,
PY - 2018/3
Y1 - 2018/3
N2 - This paper investigates the influence of time step setting on the CFD simulation result of vertical axis tidal current turbine. Two main features of time step setting have been studied. The first feature concerns with time step size setting that representing the detailed calculation on each degree in one turbine rotation. The second feature deals with number of time step setting that representing how many turbine rotations need for achieving steadiness results. In this study, two-dimensional (2D) analysis of Computational Fluid Dynamics (CFD) simulation using ANSYS-Fluent code with Sliding Mesh technique is used to solve the incompressible Unsteady Reynolds-Averaged Navier-Stokes equations. The finite volume discretization method with second-order scheme and the SIMPLE algorithm are used for all transport equations. Firstly, the numerical model has been validated with available experimental data. Some given scenarios of time step setting for vertical axis tidal turbine have been modeled subsequently. Several increment angle (1o, 5o, 10o and 20o) are investigated and chosen the best value of them. Afterwards, the best increment angle combining with several number of rotations (2, 4, 6 and 8 rotations) are investigated. The results show that the more specific of time step size has the better result but it needs more computational times. The recommendation of time step size is 5o up to 1o. The steadiness calculation result is achieved at six turbine rotations and the rest has no significant effect.
AB - This paper investigates the influence of time step setting on the CFD simulation result of vertical axis tidal current turbine. Two main features of time step setting have been studied. The first feature concerns with time step size setting that representing the detailed calculation on each degree in one turbine rotation. The second feature deals with number of time step setting that representing how many turbine rotations need for achieving steadiness results. In this study, two-dimensional (2D) analysis of Computational Fluid Dynamics (CFD) simulation using ANSYS-Fluent code with Sliding Mesh technique is used to solve the incompressible Unsteady Reynolds-Averaged Navier-Stokes equations. The finite volume discretization method with second-order scheme and the SIMPLE algorithm are used for all transport equations. Firstly, the numerical model has been validated with available experimental data. Some given scenarios of time step setting for vertical axis tidal turbine have been modeled subsequently. Several increment angle (1o, 5o, 10o and 20o) are investigated and chosen the best value of them. Afterwards, the best increment angle combining with several number of rotations (2, 4, 6 and 8 rotations) are investigated. The results show that the more specific of time step size has the better result but it needs more computational times. The recommendation of time step size is 5o up to 1o. The steadiness calculation result is achieved at six turbine rotations and the rest has no significant effect.
KW - CFD.
KW - Number of time step
KW - Sliding mesh
KW - Time step size
KW - Vertical axis turbine
UR - http://www.scopus.com/inward/record.url?scp=85047405569&partnerID=8YFLogxK
U2 - 10.15282/jmes.12.1.2018.9.0303
DO - 10.15282/jmes.12.1.2018.9.0303
M3 - Article
AN - SCOPUS:85047405569
SN - 2289-4659
VL - 12
SP - 3399
EP - 3409
JO - Journal of Mechanical Engineering and Sciences
JF - Journal of Mechanical Engineering and Sciences
IS - 1
ER -