Cite Article

Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM

Choose citation format

BibTeX

@article{IJASEIT10197,
   author = {Hamzeh Ebrahimnezhadian and Mohammad Manafpour},
   title = {Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM},
   journal = {International Journal on Advanced Science, Engineering and Information Technology},
   volume = {11},
   number = {4},
   year = {2021},
   pages = {1574--1581},
   keywords = {Aerator ramp; air entrainment; cavity length; RNG k-ε turbulence model; OpenFOAM},
   abstract = {Aeration devices are installed on chute spillways to prevent cavitation damage in high-velocity flows. Large quantities of air-entrained characterize bottom aerators along with the jet interfaces and a strong de-aeration process near the impact of the water jet with the spillway bottom. Appropriate prediction of the air entrainment process, flow characteristics, and two-phase flow pattern at the aerator would contribute to reliable spillway operation. The mathematical formulation of two-phase flow at an aerator remains a challenging issue for spillway design due to its complexities. In the present study, 2D numerical simulations are performed to predict the distribution of air concentrations, flow velocity, turbulent intensity, and water surface profile along the chute aerator using open-source OpenFOAM software and RNG k-ε turbulent model. The correlation coefficients obtained between the numerical and experimental results indicate that a proper agreement exists between the relative cavity length and velocity profile results. The research results show that the turbulent intensity of flow passing over the aerator ramp is significantly increases. It means that the ramp acts as a turbulent generator on the spillway chute. The maximum value of turbulence intensity occurs at the 6-8% of flow depth(h) from the tip of the ramp, and it is raised as the Froude number increases. It is concluded that the intake air flow rate and air-entrainment coefficient (𝛽) are linearly increased concerning the Froude number.},
   issn = {2088-5334},
   publisher = {INSIGHT - Indonesian Society for Knowledge and Human Development},
   url = {http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=10197},
   doi = {10.18517/ijaseit.11.4.10197}
}

EndNote

%A Ebrahimnezhadian, Hamzeh
%A Manafpour, Mohammad
%D 2021
%T Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM
%B 2021
%9 Aerator ramp; air entrainment; cavity length; RNG k-ε turbulence model; OpenFOAM
%! Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM
%K Aerator ramp; air entrainment; cavity length; RNG k-ε turbulence model; OpenFOAM
%X Aeration devices are installed on chute spillways to prevent cavitation damage in high-velocity flows. Large quantities of air-entrained characterize bottom aerators along with the jet interfaces and a strong de-aeration process near the impact of the water jet with the spillway bottom. Appropriate prediction of the air entrainment process, flow characteristics, and two-phase flow pattern at the aerator would contribute to reliable spillway operation. The mathematical formulation of two-phase flow at an aerator remains a challenging issue for spillway design due to its complexities. In the present study, 2D numerical simulations are performed to predict the distribution of air concentrations, flow velocity, turbulent intensity, and water surface profile along the chute aerator using open-source OpenFOAM software and RNG k-ε turbulent model. The correlation coefficients obtained between the numerical and experimental results indicate that a proper agreement exists between the relative cavity length and velocity profile results. The research results show that the turbulent intensity of flow passing over the aerator ramp is significantly increases. It means that the ramp acts as a turbulent generator on the spillway chute. The maximum value of turbulence intensity occurs at the 6-8% of flow depth(h) from the tip of the ramp, and it is raised as the Froude number increases. It is concluded that the intake air flow rate and air-entrainment coefficient (𝛽) are linearly increased concerning the Froude number.
%U http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=10197
%R doi:10.18517/ijaseit.11.4.10197
%J International Journal on Advanced Science, Engineering and Information Technology
%V 11
%N 4
%@ 2088-5334

IEEE

Hamzeh Ebrahimnezhadian and Mohammad Manafpour,"Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM," International Journal on Advanced Science, Engineering and Information Technology, vol. 11, no. 4, pp. 1574-1581, 2021. [Online]. Available: http://dx.doi.org/10.18517/ijaseit.11.4.10197.

RefMan/ProCite (RIS)

TY  - JOUR
AU  - Ebrahimnezhadian, Hamzeh
AU  - Manafpour, Mohammad
PY  - 2021
TI  - Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM
JF  - International Journal on Advanced Science, Engineering and Information Technology; Vol. 11 (2021) No. 4
Y2  - 2021
SP  - 1574
EP  - 1581
SN  - 2088-5334
PB  - INSIGHT - Indonesian Society for Knowledge and Human Development
KW  - Aerator ramp; air entrainment; cavity length; RNG k-ε turbulence model; OpenFOAM
N2  - Aeration devices are installed on chute spillways to prevent cavitation damage in high-velocity flows. Large quantities of air-entrained characterize bottom aerators along with the jet interfaces and a strong de-aeration process near the impact of the water jet with the spillway bottom. Appropriate prediction of the air entrainment process, flow characteristics, and two-phase flow pattern at the aerator would contribute to reliable spillway operation. The mathematical formulation of two-phase flow at an aerator remains a challenging issue for spillway design due to its complexities. In the present study, 2D numerical simulations are performed to predict the distribution of air concentrations, flow velocity, turbulent intensity, and water surface profile along the chute aerator using open-source OpenFOAM software and RNG k-ε turbulent model. The correlation coefficients obtained between the numerical and experimental results indicate that a proper agreement exists between the relative cavity length and velocity profile results. The research results show that the turbulent intensity of flow passing over the aerator ramp is significantly increases. It means that the ramp acts as a turbulent generator on the spillway chute. The maximum value of turbulence intensity occurs at the 6-8% of flow depth(h) from the tip of the ramp, and it is raised as the Froude number increases. It is concluded that the intake air flow rate and air-entrainment coefficient (𝛽) are linearly increased concerning the Froude number.
UR  - http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=10197
DO  - 10.18517/ijaseit.11.4.10197

RefWorks

RT Journal Article
ID 10197
A1 Ebrahimnezhadian, Hamzeh
A1 Manafpour, Mohammad
T1 Study of Two-Phase Flow Behavior around Chute Aerator Using OpenFOAM
JF International Journal on Advanced Science, Engineering and Information Technology
VO 11
IS 4
YR 2021
SP 1574
OP 1581
SN 2088-5334
PB INSIGHT - Indonesian Society for Knowledge and Human Development
K1 Aerator ramp; air entrainment; cavity length; RNG k-ε turbulence model; OpenFOAM
AB Aeration devices are installed on chute spillways to prevent cavitation damage in high-velocity flows. Large quantities of air-entrained characterize bottom aerators along with the jet interfaces and a strong de-aeration process near the impact of the water jet with the spillway bottom. Appropriate prediction of the air entrainment process, flow characteristics, and two-phase flow pattern at the aerator would contribute to reliable spillway operation. The mathematical formulation of two-phase flow at an aerator remains a challenging issue for spillway design due to its complexities. In the present study, 2D numerical simulations are performed to predict the distribution of air concentrations, flow velocity, turbulent intensity, and water surface profile along the chute aerator using open-source OpenFOAM software and RNG k-ε turbulent model. The correlation coefficients obtained between the numerical and experimental results indicate that a proper agreement exists between the relative cavity length and velocity profile results. The research results show that the turbulent intensity of flow passing over the aerator ramp is significantly increases. It means that the ramp acts as a turbulent generator on the spillway chute. The maximum value of turbulence intensity occurs at the 6-8% of flow depth(h) from the tip of the ramp, and it is raised as the Froude number increases. It is concluded that the intake air flow rate and air-entrainment coefficient (𝛽) are linearly increased concerning the Froude number.
LK http://ijaseit.insightsociety.org/index.php?option=com_content&view=article&id=9&Itemid=1&article_id=10197
DO  - 10.18517/ijaseit.11.4.10197