Comparison of Turbulence Models for Single Sphere Simulation Study Under Supercritical Fluid Condition
-
J. Malang
,
P. Kumar
and
M. O. Tade
Abstract
In this paper, the comparison of turbulence models for fluid flow past single sphere under supercritical conditions is reported. Firstly, Dixon et al.’s models [1], which are under non-supercritical conditions, were used as benchmarks to validate the simulated results. Two turbulence models namely RNG k-ε and SST k-ω models parameters were fine-tuned accordingly in order to obtain almost comparable results generated by Dixon et al.’s models [1]. The simulation works were then extended to simulate flow of supercritical carbon dioxide. The second part of this paper, therefore, presents a comparative study of the turbulence models i. e. standard k-ε, RNG k-ε, realizable k-ε and SST k-ω models. This study emphasises on the predictions and evaluations of the velocity profiles at different flow regimes namely recirculation, recovery and near-wake. Simulations were carried out to determine the velocity profiles at subcritical and supercritical conditions by varying Reynolds numbers (2000 and 20,000), pressures (65 and 80 bar) and temperatures (283.15 and 308.15K). Simulation results indicate that the predicted results are consistent with the literature data. Interesting flow features were identified for all the simulations. The results of this study also reveal that the SST k-ω turbulence model was able to better capture the flow characteristics near-wake of the sphere.
References
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Articles in the same Issue
- Editorial
- Editorial: Special Issue of 29th Symposium of Malaysian Chemical Engineers (SOMChE) 2016 – Process System Engineering
- Research Articles
- Effect of Inventory Change in a Liquid – Solid Circulating Fluidized Bed (LSCFB)
- Simulation and Optimization of the Utilization of Triethylene Glycol in a Natural Gas Dehydration Process
- Development of Adaptive Soft Sensor Using Locally Weighted Kernel Partial Least Square Model
- Comparison of Turbulence Models for Single Sphere Simulation Study Under Supercritical Fluid Condition
- Integrated Palm Biomass Supply Chain toward Sustainable Management
- Multi-Scale Control of Bunsen Section in Iodine-Sulphur Thermochemical Cycle Process
- Optimisation of Design and Operation Parameters for Multicomponent Separation via Improved Lewis-Matheson Method
- The Effect of Various Components of Triglycerides and Conversion Factor on Energy Consumption in Biodiesel Production
- CFD Simulation on the Hydrodynamics in Gas-Liquid Airlift Reactor
- Analysis of the Steady-State Multiplicity Behavior for Polystyrene Production in the CSTR
- Numerical Studies on the Laminar Thermal-Hydraulic Efficiency of Water-Based Al2O3 Nanofluid in Circular and Non-Circular Ducts
- Simultaneous Carbon Capture and Reuse Using Catalytic Membrane Reactor in Water-Gas Shift Reaction
