Abstract:

Non-hydrostatic 3D numerical simulations were conducted using ANSYS Fluent commercial computational fluid dynamics software to study the impact of diel vertical migration of zooplankton on turbulence and current velocity. Simulations were initialized with velocity and density profiles from observations at two sites: the Straits of Florida and Saanich Inlet, British Columbia, Vancouver, Canada. Each model run covers 35 minutes (following a 2-hour spin-up). More details can be found in the associated paper. Dean, C., Soloviev, A., Hirons, A., Frank, T., Wood, J., (2015) Biomixing Due to diel vertical migrations of zooplankton: Comparison of computational fluid dynamics model with observations. Ocean Modelling. 98: 51-64. doi: 10.1016/j.ocemod.2015.12.002

Suggested Citation:

Dean, C., Soloviev, A., Hirons, A., Frank, T., Wood, J.. 2017. ANSYS Fluent Computational Fluid Dynamics Simulations of Biomixing Due to Diel Vertical Migrations of Zooplankton. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7CJ8BH7

Publications:

Dean, C., Soloviev, A., Hirons, A., Frank, T., & Wood, J. (2016). Biomixing due to diel vertical migrations of zooplankton: Comparison of computational fluid dynamics model with observations. Ocean Modelling, 98, 51–64. doi:10.1016/j.ocemod.2015.12.002

Purpose:

To determine at what concentration of zooplankton undergoing diel vertical migration appreciable turbulence is generated and compare that to available turbulence measurements in the literature.

Data Parameters and Units:

Case and data files from ANSYS fluent are provided. These files can be loaded directly into ANSYS Fluent. All .dat files contain the following parameters: X [ m ], Y [ m ], Z [ m ], Absolute Angular Coordinate [ degree ], Absolute Pressure [ Pa ], Adaption Curvature, Adaption Function, Adaption Iso Value, Adaption Space Gradient, Angular Coordinate [ degree ], Approximated Mass Flow [ kg s^-1 ], Area [ m^2 ], Axial Coordinate [ m ], Boundary Cell Distance, Boundary Normal Distance, Boundary Volume Distance, Cell Children, Cell Convective Courant Number, Cell Element Type, Cell Equiangle Skew, Cell Equivolume Skew, Cell Partition, Cell Refine Level, Cell Reynolds Number, Cell Surface Area, Cell Volume [ m^3 ], Cell Volume Change, Cell Wall Distance [ m ], Cell Warpage, Cell Weight, Cell Zone Index, Cell Zone Type, Connectivity Number, Density [ kg m^-3 ], Density All [ kg m^-3 ], Diffusion Coef. Of Scalar 0, Dp Dx [ kg m^-2 s^-2 ], Dp Dy [ kg m^-2 s^-2 ], Dp Dz [ kg m^-2 s^-2 ], Dx Velocity Dx [ s^-1 ], Dx Velocity Dy [ s^-1 ], Dx Velocity Dz [ s^-1 ], Dy Velocity Dx [ s^-1 ], Dy Velocity Dy [ s^-1 ], Dy Velocity Dz [ s^-1 ], Dynamic Pressure [ Pa ], Dynamic Viscosity [ Pa s ], Dz Velocity Dx [ s^-1 ], Dz Velocity Dy [ s^-1 ], Dz Velocity Dz [ s^-1 ], Eddy Viscosity Ratio Subgrid, Eddy Viscosity Subgrid [ Pa s ], Edge Length Ratio, Effective Prandtl Number, Effective Thermal Conductivity [ W m^-1 K^-1 ], Element Volume Ratio, Face Area Magnitude [ m^2 ], Face Area X [ m^2 ], Face Area Y [ m^2 ], Face Area Z [ m^2 ], Face Handedness, Force [ N ], Force X [ N ], Force Y [ N ], Force Z [ N ], Heat Flux [ W m^-2 ], Helicity [ m s^-2 ], Interface Overlap Fraction, Internal Energy [ J kg^-1 ], Interpolated Mass Flow [ kg s^-1 ], Length [ m ], Mark Poor Elements, Mass Flow [ kg s^-1 ], Mass Flux [ kg s^-1 m^-2 ], Mass Imbalance [ kg s^-1 ], Maximum Face Angle [ degree ], Mesh Velocity U [ m s^-1 ], Mesh Velocity V [ m s^-1 ], Mesh Velocity W [ m s^-1 ], Minimum Face Angle [ degree ], Normal, Normal X, Normal Y, Normal Z, Normalized Q Criterion, Orthogonal Quality, Particle Enthalpy Source [ W ], Particle Mass Concentration [ kg m^-3 ], Particle Mass Source [ kg s^-1 ], Particle Momentum Source X [ N ], Particle Momentum Source Y [ N ], Particle Momentum Source Z [ N ], Partition Neighbors, Prandtl Number, Pressure [ Pa ], Pressure Coefficient, Q Criterion [ s^-2 ], Radial Angular Coordinate [ m ], Relative Total Pressure [ Pa ], Relative Velocity [ m s^-1 ], Relative Velocity X [ m s^-1 ], Relative Velocity Y [ m s^-1 ], Relative Velocity Z [ m s^-1 ], Rothalpy [ J kg^-1 ], Scalar 0, Skin Friction Coefficient, Specific Heat Capacity At Constant Pressure [ J kg^-1 K^-1 ], Static Enthalpy [ J kg^-1 ], Static Entropy [ J kg^-1 K^-1 ], Strain Rate [ s^-1 ], Subgrid Effective Viscosity [ Pa s ], Subgrid Filter Length [ m ], Surface Heat Transfer Coefficient [ W m^-2 K^-1 ], Surface Nusselt Number, Surface Stanton Number, Temperature [ K ], Surface Tension [ N/m ], Thermal Conductivity [ W m^-1 K^-1 ], Total Energy [ J kg^-1 ], Total Enthalpy [ J kg^-1 ], Total Enthalpy Deviation [ J kg^-1 ], Total Pressure [ Pa ], Total Temperature [ K ], Total Temperature In Stn Frame [ K ], Turbulence, Velocity [ m s^-1 ], Velocity Angle [ degree ], Velocity Angle In Stn Frame [ degree ], Velocity Axial [ m s^-1 ], Velocity Circumferential [ m s^-1 ], Velocity Circumferential In Stn Frame [ m s^-1 ], Velocity Radial [ m s^-1 ], Velocity u [ m s^-1 ], Velocity u.Gradient [ s^-1 ], Velocity u.Gradient X [ s^-1 ], Velocity u.Gradient Y [ s^-1 ], Velocity u.Gradient Z [ s^-1 ], Velocity v [ m s^-1 ], Velocity v.Gradient [ s^-1 ], Velocity v.Gradient X [ s^-1 ], Velocity v.Gradient Y [ s^-1 ], Velocity v.Gradient Z [ s^-1 ], Velocity w [ m s^-1 ], Velocity w.Gradient [ s^-1 ], Velocity w.Gradient X [ s^-1 ], Velocity w.Gradient Y [ s^-1 ], Velocity w.Gradient Z [ s^-1 ], Velocity.Absolute Helicity [ m s^-2 ], Velocity.Curl [ s^-1 ], Velocity.Curl X [ s^-1 ], Velocity.Curl Y [ s^-1 ], Velocity.Curl Z [ s^-1 ], Velocity.Divergence [ s^-1 ], Velocity.Helicity [ m s^-2 ], Velocity.Invariant Q [ s^-2 ], Velocity.Lambda 2 [ s^-2 ], Velocity.Normal Eigen Helicity [ s^-1 ], Velocity.Real Eigen Helicity [ s^-1 ], Velocity.Real Eigenvalue [ s^-1 ], Velocity.Stretched Swirling Strength, Velocity.Swirling Discriminant [ s^-6 ], Velocity.Swirling Normal [ s^-1 ], Velocity.Swirling Normal X [ s^-1 ], Velocity.Swirling Normal Y [ s^-1 ], Velocity.Swirling Normal Z [ s^-1 ], Velocity.Swirling Strength [ s^-1 ], Velocity.Swirling Vector [ s^-1 ], Velocity.Swirling Vector X [ s^-1 ], Velocity.Swirling Vector Y [ s^-1 ], Velocity.Swirling Vector Z [ s^-1 ], Viscosity, Volume [ m^3 ], Vorticity, Vorticity X, Vorticity Y, Vorticity Z, Wall Adjacent Temperature [ K ], Wall Heat Transfer Coefficient [ W m^-2 K^-1 ], Wall Shear [ Pa ], Wall Shear X [ Pa ], Wall Shear Y [ Pa ], Wall Shear Z [ Pa ], Wall Temperature [ K ], Wall Temperature Thin [ K ], X [ m ], Y [ m ], Yplus, Z [ m ]

Methods:

LES WALE turbulence model, discrete phase model to simulate Lagrangian particle motion as a proxy for zooplankton migration.

Instruments:

ANSYS Fluent software

Individual Files: