Learning Forum

[Abhinav_Maurya]

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: OFF

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: OFF

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: OFF

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: When the simulation was performed using method 2 for the homogeneous phase, the simulation ran smoothly

[Rob]

How are you adding a tracer if species is off?

[Abhinav_Maurya]

Correction: Species transport is on During tracer injection and Post tracer injection

[Rob]

What's the difference between Method 1 & 2?

[Rob]

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