<p data-start=”290″ data-end=”314″>Dear ANSYS Support Team,<\/p><p data-start=”316″ data-end=”577″>I am performing a transient VOF simulation of two liquid jets intersecting at 90° and forming a liquid sheet. The final timestep of the simulation typically shows a physically correct liquid sheet, and the sheet formation and breakup behavior appear reasonable.<\/p><p data-start=”579″ data-end=”719″>However, during intermediate timesteps, the α = 0.5 isosurface often appears highly fragmented and randomly dispersed throughout the domain.<\/p><p data-start=”721″ data-end=”852″>I am trying to understand whether this behavior is related to Adaptive Mesh Refinement (AMR) projection or another numerical issue.<br><br><\/p><p data-start=”907″ data-end=”956″>I am observing the following unexpected behavior:<\/p><ul data-start=”958″ data-end=”1080″><li data-start=”958″ data-end=”1002″><p data-start=”960″ data-end=”1002″>Let <strong data-start=”964″ data-end=”970″>x1<\/strong> be the final timestep of a run.<\/p><\/li>\n
<li data-start=”1003″ data-end=”1080″><p data-start=”1005″ data-end=”1080″>At timestep x1, the liquid sheet appears correct and physically consistent.<\/p><\/li>\n<\/ul>\n
<p data-start=”1082″ data-end=”1174″>Now, if I return to the solver and continue running the simulation for a few more timesteps:<\/p><ul data-start=”1176″ data-end=”1303″><li data-start=”1176″ data-end=”1219″><p data-start=”1178″ data-end=”1219″>Let <strong data-start=”1182″ data-end=”1188″>x2<\/strong> become the new final timestep.<\/p><\/li>\n
<li data-start=”1220″ data-end=”1303″><p data-start=”1222″ data-end=”1303″>At timestep x2, the liquid sheet again appears correct and physically consistent.<\/p><\/li>\n<\/ul>\n
<p data-start=”1305″ data-end=”1313″>However:<\/p><ul data-start=”1315″ data-end=”1520″><li data-start=”1315″ data-end=”1428″><p data-start=”1317″ data-end=”1428″>When I go and visualize timestep x1 (which previously showed a correct sheet before continuing the run),<\/p><\/li>\n
<li data-start=”1429″ data-end=”1520″><p data-start=”1431″ data-end=”1520″>The α = 0.5 isosurface at x1 is now highly distorted, fragmented, and randomly dispersed.<\/p><\/li>\n<\/ul>\n
<p data-start=”1522″ data-end=”1634″>In other words, a previously correct timestep becomes visually corrupted after advancing the simulation further.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-453473","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["453473"],"_bbp_subscription":["657608","199"],"_bbp_author_ip":["130.94.111.67"],"_bbp_last_reply_id":["453531"],"_bbp_last_active_id":["453531"],"_bbp_last_active_time":["2026-03-02 09:38:50"],"_bbp_reply_count":["1"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["657608","199"],"_btv_view_count":["47"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1772268324:657608"]},"test":"muhammadyaseenkhan171gmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/453473","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\/453473\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=453473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}