{"action":"closed","issue":{"url":"https://api.github.com/repos/firemodels/fds-smv/issues/3209","labels_url":"https://api.github.com/repos/firemodels/fds-smv/issues/3209/labels{/name}","comments_url":"https://api.github.com/repos/firemodels/fds-smv/issues/3209/comments","events_url":"https://api.github.com/repos/firemodels/fds-smv/issues/3209/events","html_url":"https://github.com/firemodels/fds-smv/issues/3209","id":121373971,"number":3209,"title":"open boundary with loss coefficient using HVAC namelist group","user":{"login":"fdsuser","id":16213928,"avatar_url":"https://avatars.githubusercontent.com/u/16213928?v=3","gravatar_id":"","url":"https://api.github.com/users/fdsuser","html_url":"https://github.com/fdsuser","followers_url":"https://api.github.com/users/fdsuser/followers","following_url":"https://api.github.com/users/fdsuser/following{/other_user}","gists_url":"https://api.github.com/users/fdsuser/gists{/gist_id}","starred_url":"https://api.github.com/users/fdsuser/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/fdsuser/subscriptions","organizations_url":"https://api.github.com/users/fdsuser/orgs","repos_url":"https://api.github.com/users/fdsuser/repos","events_url":"https://api.github.com/users/fdsuser/events{/privacy}","received_events_url":"https://api.github.com/users/fdsuser/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":{"login":"drjfloyd","id":12799217,"avatar_url":"https://avatars.githubusercontent.com/u/12799217?v=3","gravatar_id":"","url":"https://api.github.com/users/drjfloyd","html_url":"https://github.com/drjfloyd","followers_url":"https://api.github.com/users/drjfloyd/followers","following_url":"https://api.github.com/users/drjfloyd/following{/other_user}","gists_url":"https://api.github.com/users/drjfloyd/gists{/gist_id}","starred_url":"https://api.github.com/users/drjfloyd/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/drjfloyd/subscriptions","organizations_url":"https://api.github.com/users/drjfloyd/orgs","repos_url":"https://api.github.com/users/drjfloyd/repos","events_url":"https://api.github.com/users/drjfloyd/events{/privacy}","received_events_url":"https://api.github.com/users/drjfloyd/received_events","type":"User","site_admin":false},"milestone":null,"comments":7,"created_at":"2015-12-10T00:30:53Z","updated_at":"2015-12-23T19:39:37Z","closed_at":"2015-12-23T19:39:37Z","body":"I'm trying to simulate a fire with an open boundary at one side. The open boundary requires loss coefficient of 1. I tried two methods:\r\n\r\nHVAC_SAMPLE_TEST_1\r\nI set up a HVAC network adjacent to open boundary. I'm getting an numerical instability.\r\n\r\nHVAC_SAMPLE_TEST_2\r\nI set up a HVAC network at one side using AMBIENT=.TRUE. \r\nThe simulation shows the air trapped inside and it is not connected to exterior.\r\n\r\nPlease advise how to make the air flow through open boundary with loss coefficient of 1 at the exit. Thanks in advance. \r\n\r\n\r\n\r\n\r\n[HVAC_SAMPLE_TEST_2.txt](https://github.com/firemodels/fds-smv/files/57501/HVAC_SAMPLE_TEST_2.txt)\r\n\r\n\r\n\r\n\r\n[HVAC_SAMPLE_TEST.txt](https://github.com/firemodels/fds-smv/files/57495/HVAC_SAMPLE_TEST.txt)\r\n"}}