{"id":168431,"date":"2022-04-13T04:22:27","date_gmt":"2022-04-13T04:22:27","guid":{"rendered":"\/forum\/forums\/topic\/species-mass-transfer-co2-to-h2o\/"},"modified":"2022-04-14T14:45:05","modified_gmt":"2022-04-14T14:45:05","slug":"species-mass-transfer-co2-to-h2o","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/species-mass-transfer-co2-to-h2o\/","title":{"rendered":"Species Mass Transfer (CO2 to H2O)"},"content":{"rendered":"
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Hi,<\/p>\n

I have problem with species mass transfer problem from CO2 to H2o. <\/p>\n

In my case, four species in two phase (First gas phase: CO2 0.114, N2 0.886 and Second Liquid Phase: H20 0.8, MEA 0.2)<\/p>\n

I used henry's law for mass transfer model, but temperature is increased, my time step is 1e-4, So I wrote udf, but udf is not initialized. <\/p>\n

#include "udf.h"<\/p>\n

DEFINE_MASS_TRANSFER(liq_gas_source, cell, thread, from_index, from_species_index, to_index, to_species_index)<\/p>\n

{<\/p>\n

real m_lg;<\/p>\n

real T_SAT = 373.15;<\/p>\n

Thread *gas = THREAD_SUB_THREAD(thread, from_index); \/* gas phase*\/<\/p>\n

Thread *liq = THREAD_SUB_THREAD(thread, to_index); \/* liquid phase*\/<\/p>\n

m_lg = 0.; \/* initialisation*\/<\/p>\n

if ( (C_VOF(cell,gas) >0.0) && (C_VOF(cell,gas) <0.114))<\/p>\n

{<\/p>\n

m_lg = 0.1* C_VOF(cell,gas) * C_R(cell,gas) * C_YI(cell , gas , 0) ;<\/p>\n

\/*here C_YI(c, gas, 0 ), denotes species mass fraction of 1st species in the mixture denoted by phase 'gas'*\/<\/p>\n

}<\/p>\n

return (m_lg);<\/p>\n

}<\/p>\n

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

Please give your suggestions<\/p>\n

thank you in advanced<\/p>\n","protected":false},"template":"","class_list":["post-168431","topic","type-topic","status-closed","hentry","topic-tag-dramine-1"],"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