{"id":450584,"date":"2026-01-17T08:28:36","date_gmt":"2026-01-17T08:28:36","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/multiphase-and-multicomponent-flow-in-turbomachinery\/"},"modified":"2026-01-17T08:28:36","modified_gmt":"2026-01-17T08:28:36","slug":"multiphase-and-multicomponent-flow-in-turbomachinery","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/multiphase-and-multicomponent-flow-in-turbomachinery\/","title":{"rendered":"Multiphase and Multicomponent Flow in Turbomachinery"},"content":{"rendered":"<p>&lt;p&gt;Hi everyone,&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; I am currently studying a geometric model of a <em><strong>two-stage turbine<\/strong><\/em>, with carbon dioxide, nitrogen, and water vapor as the working medium. Now, I aim to investigate the condensation of water vapor in the mixed working fluid during the expansion process. For this <em><strong>multiphase and multicomponent model<\/strong><\/em>, I plan to use the <em><strong>Mixture model + species transport + mixing plane model<\/strong><\/em> in Fluent. However, I found that the <em><strong>mixing plane model is not supported alongside the Mixture model<\/strong><\/em>. Strangely, only the Wet Steam model among the multiphase flow models supports this, and I also discovered that the species transport model can be used simultaneously with the mixing plane model. My current approach is to use only the species transport and mixing plane models, solving only the mass, momentum, and energy equations of the gas phase, and adding respective phase change source terms. Will this gas-phase-only method cause physical distortion? Additionally, are there better methods to model this problem?&lt;\/p&gt;&lt;div class=&#8221;ds-message _63c77b1&#8243; style=&#8221;&#8211;panel-width: 0px;&#8221;&gt;&lt;div class=&#8221;ds-markdown&#8221; style=&#8221;&#8211;ds-md-zoom: 1.143;&#8221;&gt;&lt;p class=&#8221;ds-markdown-paragraph&#8221;&gt;Thank you in advance for your time and expertise. Any guidance or suggestions would be of immense help to my research.&lt;\/p&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;div class=&#8221;ds-flex _0a3d93b&#8221; style=&#8221;align-items: center; gap: 10px;&#8221;&gt;&lt;div class=&#8221;ds-flex _965abe9 _54866f7&#8243; style=&#8221;align-items: center; gap: 10px;&#8221;&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;\/div&gt;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;div class=&#8221;db183363 ds-icon-button ds-icon-button&#8211;m ds-icon-button&#8211;sizing-container&#8221; tabindex=&#8221;0&#8243; role=&#8221;button&#8221; aria-disabled=&#8221;false&#8221;&gt;&nbsp;&lt;\/div&gt;&lt;p&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/01\/17-01-2026-1768638268-mceclip0.png\" \/>&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-450584","topic","type-topic","status-publish","hentry","topic-tag-ansys-fluent","topic-tag-mixing-plane-1","topic-tag-mixture-of-gas","topic-tag-mutiphase-1","topic-tag-turbo-machinery"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["291843"],"_bbp_topic_id":["450584"],"_bbp_subscription":["526202","199","34559"],"_bbp_author_ip":["156.229.164.178"],"_bbp_last_reply_id":["450886"],"_bbp_last_active_id":["450886"],"_bbp_last_active_time":["2026-01-21 11:36:03"],"_bbp_reply_count":["6"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["3"],"_bbp_engagement":["526202","199","34559"],"_btv_view_count":["195"],"_bbp_topic_status":["unanswered"]},"test":"james411projectgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/450584","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\/450584\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=450584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}