Abstract:

Numerical simulations of buoyant plumes driven by different buoyancy flux sources: thermal, due to the presence of bubbles or a combination.

Suggested Citation:

Alexandre Fabregat Tomas. 2017. Numerical simulations of thermal, bubbles and hybrid plumes. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7MS3QS2

Publications:

Fabregat, A., Dewar, W. K., Özgökmen, T. M., Poje, A. C., & Wienders, N. (2015). Numerical simulations of turbulent thermal, bubble and hybrid plumes. Ocean Modelling, 90, 16–28. doi:10.1016/j.ocemod.2015.03.007

Purpose:

Use turbulence resolving simulations to analyze the effect of the inlet buoyancy flux nature (thermal or gas phase) on the plume turbulence characterization in the very near field region where stratification effects are negligible.

Data Parameters and Units:

All variables are non-dimensionalized Vertical location, Mean vertical velocity, Mean temperature, Mean gas volume fraction Vertical location, Q (volume flux), M (momentum flux), B (buoyancy flux) Vertical location, sigma (half-width best Gaussian fit) Vertical location, alpha (entrainment coefficient), lambda (scalar-to-momentum plume widths), gamma (momentum amplification factor) Vertical location, umean: Mean radial velocity, vmean: Mean azimuthal velocity, wmean: Mean vertical velocity, pmean: Mean pressure, tmean: Mean temperature perturbation, amean: Mean gas volume fraction,bmean: Mean passive scalar volume fraction, urms: Radial velocity r.m.s., vrms: Azimuthal velocity r.m.s., wrms: Vertical velocity r.m.s., trms: Temperature velocity r.m.s., arms: Gas volume fraction velocity r.m.s., brms: Passive scalar velocity r.m.s., uvms: Reynolds stresses , vwms: Reynolds stresses , wums: Reynolds stresses , utms: Turbulent flux term for the temperature, vtms: Turbulent flux term for the temperature, wtms: Turbulent flux term for the temperature, uams: Turbulent flux term for the gas volume fraction, vams: Turbulent flux term for the gas volume fraction, wams: Turbulent flux term for the gas volume fraction, ubms: Turbulent flux term for the passive scalar, vbms: Turbulent flux term for the passive scalar, wbms: Turbulent flux term for the passive scalar for each of 100 radial locations in a grid of dimensions r=[0,2.5] in the radial \times z=[0,10] in the vertical

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