Tracer amount keeps on increasing in the tundish in two phase flow
Steps being followed:
(Before tracer injection) 1. Setup: realizable K-e, standard wall functions; Multiphase - VOF; Species transport: OFF 2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1) Ran the simulation in steady state, obtained converged solution post 20000 iterations. (During tracer injection) - Switched to Transient simulation 1. Setup: realizable K-e, standard wall functions; Multiphase - VOF; Species transport: ON 2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 1) 3. In the solution --> Controls --> Equation, Flow: Off, Volume Fraction: On, Turbulence: On, Tracer: On (Post Tracer Injection) [Method 1] 1. Setup: realizable K-e, standard wall functions; Multiphase - VOF; Species transport: ON 2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 0) 3. In the solution --> Controls --> Equation, Flow: On, Volume Fraction: On, Turbulence: On, Tracer: Off [Method 2] 1. Setup: realizable K-e, standard wall functions; Multiphase - VOF; Species transport: ON 2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 0) 3. In the solution --> Controls --> Equation, Flow: On, Volume Fraction: On, Turbulence: On, Tracer: On While following Method 1, tracer amount doesn't increase in tundish. However, if method 2 is followed, tracer amount increases. P.S: I performed the simulation using method 2 for the homogeneous phase and the simulation ran smoothly |
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