{"id":338807,"date":"2023-12-15T18:50:31","date_gmt":"2023-12-15T18:50:31","guid":{"rendered":"\/forum\/forums\/topic\/error-when-adding-gas-to-liquid-in-fluent\/"},"modified":"2023-12-15T18:50:31","modified_gmt":"2023-12-15T18:50:31","slug":"error-when-adding-gas-to-liquid-in-fluent","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/error-when-adding-gas-to-liquid-in-fluent\/","title":{"rendered":"Error when adding gas to liquid in fluent"},"content":{"rendered":"

Hi all.<\/span><\/span><\/span><\/p>\n

 I made a calculation for a centrifugal pump using water from a fluent base.<\/span><\/span><\/span><\/p>\n

Now I want to add methane 10% of the total volume. <\/span><\/span><\/span><\/p>\n

I create a mixture of two phases, the first phase is water, the second is methane (take methane from the fluent base). Methane with density = constant, incompressible. <\/span><\/span><\/span><\/p>\n

Screenshots of the mixture settings, I think everything is correct:<\/span><\/span><\/span><\/p>\n

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

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

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

At the inlet I set the pressure to 2 atm. The output is consumption. Now I have two inputs and 2 outputs (water, methane and mixture). At the mixture inlet I set the pressure to 2 atm. For methane, volume fraction = 0.1 (10% of the volume of the entire mixture).<\/span><\/span><\/span><\/p>\n

At the output, I set the costs for water and methane. Now I have reduced the water consumption by 10%, and set this 10% for methane. Thus, we indicated to the program that 10% of methane from the entire mixture came in and came out.<\/span><\/span><\/span><\/p>\n

Screenshots of input and output settings, I think everything is correct: <\/span><\/span><\/span><\/p>\n

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

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

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

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

I also turned on the power so I could measure the temperature of the environment later. My goal is to increase the amount of gas and measure the temperature.<\/span><\/span><\/span><\/p>\n

But when I start the calculation, the k and continuity indicators increase sharply and then all the others, I get an error and the calculation ends. Why?<\/span><\/span><\/span><\/strong><\/p>\n

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

I also tried: <\/span><\/span><\/span><\/p>\n

reduce relaxation coefficients <\/span><\/span><\/span><\/p>\n

change calculation methods (coupled, simple) <\/span><\/span><\/span><\/p>\n

change the viscosity model (SST, k-e) <\/span><\/span><\/span><\/p>\n

I also reduced the minimum step to 1e-8 <\/span><\/span><\/span><\/p>\n

nothing helps. <\/span><\/span><\/span><\/p>\n

Help me please.<\/span><\/span><\/span><\/p>\n","protected":false},"template":"","class_list":["post-338807","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["257647","15180"],"_bbp_author_ip":["23.206.193.59"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["231"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["338807"],"_bbp_forum_id":["27792"],"_bbp_engagement":["15180","257647"],"_bbp_voice_count":["2"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["341642"],"_bbp_last_active_id":["341642"],"_bbp_last_active_time":["2023-12-22 01:53:33"]},"test":"javat33489gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/338807","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/338807\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=338807"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}