I have been trying to run my first calculation model but am having some difficulties. I am extremely new to CFD\/Fluent but have tried to read up as much information on the interweb as possible. Much of it is confusing however but I am trying my best….<\/p>\n
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My model is of an internal combustion engine inlet tract terminating in a new valve shape. I believe my mesh is reasonable but I stand to be corrected. <\/p>\n
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Air enters the airhorn (massflow_inlet) at 45.4m\/s which implies around 0.2048kg\/s of air (68.4mm diameter and 1.225 kg\/m3 density). This value has been entered in the boundary conditions. I am wanting to analyse the flow through the entire model (under a fixed inlet flow of 45.4m\/s) and to see how the flow (speed, pressure, uniformity, turbulance) looks at the outlet.<\/p>\n
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I have been researching whether this should be a pressure or density based calculation and settled on density but still confused. I assume it should be a ‘time steady’ calc but again not 100%.<\/p>\n
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I am getting an immediate issue when running the calculation that Fluent reports a “floating point exception” and stops the model. I can also see in the console window that it shows reverse flow at either or both the inlet and outlet which confuses me as I am not expecting backflow anywhere. I am nor expecting this forum to teach me how to use this tool better but any pointers (in basic\/beginner terms lol) would be appreciated.<\/p>\n
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I have run the model previously with other settings (of which I did not take sufficient notes and have therefore forgotten) that either did complete the iterations but did not converge or against eventually gave a “floating point error”.<\/p>\n
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Guidance appreciated…..<\/p>\n
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PS – is that the correct file to upload??<\/p>\n","protected":false},"template":"","class_list":["post-36377","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["8549"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0"],"_btv_view_count":["280"],"_bbp_subscription":["241134"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["36377"],"_bbp_forum_id":["27792"],"_bbp_engagement":["240","22555","166472"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["89360"],"_bbp_last_active_id":["89360"],"_bbp_last_active_time":["2019-07-12 06:11:14"]},"test":"glenn"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/36377","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\/36377\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=36377"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}