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11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Two-fluid model based on the lattice Boltzmann equation.
1Beijing Key Laboratory of Green Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
Summary
A novel two-fluid model using lattice Boltzmann equations (LBE) accurately simulates dispersed two-phase flows. This method simplifies phase hold-up calculation and shows good agreement with conventional models.
Area of Science:
- Computational fluid dynamics
- Multiphase flow modeling
- Statistical physics
Background:
- Dispersed two-phase flows are crucial in many industrial processes.
- Existing continuum-based two-fluid models can be computationally intensive.
- Lattice Boltzmann Equation (LBE) offers a promising alternative for mesoscopic simulations.
Purpose of the Study:
- To propose a novel two-fluid model for dispersed two-phase flows.
- To leverage the lattice Boltzmann equation for simulating two-phase systems.
- To validate the model against established methods.
Main Methods:
- Utilized two sets of lattice Boltzmann equations (LBEs) to represent distinct fluid phases.
- Derived continuum-based continuity and Navier-Stokes equations from LBEs by incorporating a pressure term.
- Employed the ideal gas equation of state for phase pressure calculations.
- Simulated a laminar gas-liquid two-phase flow scenario.
Main Results:
- The proposed LBE-based two-fluid model successfully simulated the gas-liquid flow.
- Phase hold-up was efficiently calculated using partial pressures derived from the ideal gas law.
- Simulation results demonstrated good agreement with a conventional continuum-based two-fluid model.
Conclusions:
- The LBE-based two-fluid model provides an effective approach for dispersed two-phase flow simulations.
- The model offers a simplified method for calculating phase hold-up.
- This approach shows potential for accurate and efficient multiphase flow analysis.