{"id":166255,"date":"2022-02-09T13:50:20","date_gmt":"2022-02-09T13:50:20","guid":{"rendered":"\/forum\/forums\/topic\/tracer-amount-keeps-on-increasing-in-the-tundish-during-rtd-calcuation-for-two-phase-flow\/"},"modified":"2022-02-21T12:48:51","modified_gmt":"2022-02-21T12:48:51","slug":"tracer-amount-keeps-on-increasing-in-the-tundish-during-rtd-calcuation-for-two-phase-flow","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tracer-amount-keeps-on-increasing-in-the-tundish-during-rtd-calcuation-for-two-phase-flow\/","title":{"rendered":"Tracer amount keeps on increasing in the tundish during RTD calcuation for two phase flow"},"content":{"rendered":"
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Steps being followed:<\/p>\n

(Before tracer injection)<\/strong><\/p>\n

1. Setup: realizable K-e, standard wall functions; Multiphase – VOF; Species transport: OFF<\/p>\n

2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1)<\/p>\n

Ran the simulation in steady state, obtained converged solution post 20000 iterations.<\/p>\n

<\/p>\n<\/p>\n

(During tracer injection) – Switched to Transient simulation<\/strong><\/p>\n

1. Setup: realizable K-e, standard wall functions; Multiphase – VOF; Species transport: OFF<\/p>\n

2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 1)<\/p>\n

3. In the solution –> Controls –> Equation, Flow: Off, Volume Fraction: On, Turbulence: On, Tracer: On<\/p>\n

<\/p>\n<\/p>\n

(Post Tracer Injection)<\/strong><\/p>\n

[Method 1]<\/p>\n

1. Setup: realizable K-e, standard wall functions; Multiphase – VOF; Species transport: OFF<\/p>\n

2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 0)<\/p>\n

3. In the solution –> Controls –> Equation, Flow: On, Volume Fraction: On, Turbulence: On, Tracer: Off<\/p>\n

<\/p>\n<\/p>\n

[Method 2]<\/p>\n

1. Setup: realizable K-e, standard wall functions; Multiphase – VOF; Species transport: OFF<\/p>\n

2. Side Inlet: Air (Vol. frac 0); Top Inlet: Water (Vol. frac 1 but tracer mass fraction = 0)<\/p>\n

3. In the solution –> Controls –> Equation, Flow: On, Volume Fraction: On, Turbulence: On, Tracer: On<\/p>\n

<\/p>\n<\/p>\n

While following Method 1, tracer amount doesn't increase in tundish. However, if method 2 is followed, tracer amount increases.<\/p>\n

P.S: When the simulation was performed using method 2 for the homogeneous phase, the simulation ran smoothly<\/p>\n","protected":false},"template":"","class_list":["post-166255","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t