{"id":320658,"date":"2023-12-04T07:18:12","date_gmt":"2023-12-04T07:18:12","guid":{"rendered":"\/forum\/forums\/topic\/creating-an-air-area\/"},"modified":"2023-12-04T07:18:12","modified_gmt":"2023-12-04T07:18:12","slug":"creating-an-air-area","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/creating-an-air-area\/","title":{"rendered":"Creating an Air Area"},"content":{"rendered":"<p>Hello<\/p>\n<p>I am looking to simulate the free-fall of a ball, aiming to create an air domain to replicate real-world experiments. Currently, I am using ALE (Arbitrary Lagrangian-Eulerian) to generate the air domain. I am using the MAT_NULL keyword to represent air properties, but I wanted to confirm if it is appropriate for simulating air. If there are alternative materials (MAT) that you recommend for this purpose, please let me know.Additionally, I would like to inquire about the keywords required for modeling the contact between the air domain and the ball. Is CONSTRAINED_LAGRANGE_IN_SOLID the appropriate keyword for this purpose, or are there alternative approaches you would suggest?<\/p>\n<p>I appreciate your guidance on these matters.<\/p>\n","protected":false},"template":"","class_list":["post-320658","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["291500","21501","240"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1185"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["320658"],"_bbp_forum_id":["27814"],"_bbp_engagement":["240","21501","291500"],"_bbp_voice_count":["3"],"_bbp_reply_count":["10"],"_bbp_last_reply_id":["339185"],"_bbp_last_active_id":["339185"],"_bbp_last_active_time":["2023-12-18 21:35:32"]},"test":"koko1412spacesystemgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/320658","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\/320658\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=320658"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}