{"id":38295,"date":"2019-10-13T11:46:55","date_gmt":"2019-10-13T11:46:55","guid":{"rendered":"\/forum\/forums\/topic\/discrete-ordinate-radiation-model-solar-collector\/"},"modified":"2019-10-13T11:46:55","modified_gmt":"2019-10-13T11:46:55","slug":"discrete-ordinate-radiation-model-solar-collector","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/discrete-ordinate-radiation-model-solar-collector\/","title":{"rendered":"Discrete ordinate radiation model, solar collector"},"content":{"rendered":"

Hi, <\/p>\n

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I’m trying to simulate the solar radiation for the solar collector using the DO radiation model available in ANSYS-Fluent. I’m using the solar ray tracing model as a solar load, and thus solar ray is converted to heat, and absorbed by the working fluid. I’m using the incident solar radiation value, 10,000 W\/m^2 (, which is equivalent to 10 suns) as an input to the collector’s top surface (Jusy a Face, not body), which is expected to be uniform on the face. I considered the non-gray surface and solar wavelength was in a range between 0.5um to 1.5 um. <\/p>\n

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I’ve checked with angular discretization, mesh study. Then, I’ve done the set up of the DO model following the above criteria, like as follows: <\/p>\n

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After that, I followed the necessary fluid properties, and set up for the solar inlet face as follows:<\/p>\n

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I found a good convergence, but I’m not sure about the outcome (Wall flux—>surface incident radiation, \/m^2), as it shows not exactly the same value that I input as incoming solar radiation. Moreover, wall flux—>sun heat flux is zero on the top face. <\/p>\n

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and <\/p>\n

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I suspect the reason for such a curve rather than a uniform manner is the absorption coefficient value of the working fluid. In fact, there is no solid body considered for glass (solar window) but only face. <\/p>\n

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Could you please guide me, whether my DO model set up is ok or not?<\/p>\n

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Is the direction value ok in terms of Sun direction vector, beam direction?<\/p>\n

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And, which solar radiation value (surface incident radiation\/incident radiation) represents my actual incoming radiation? <\/p>\n

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 <\/p>\n

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Thanks in advance. <\/p>\n

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 <\/p>\n","protected":false},"template":"","class_list":["post-38295","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["10473"],"_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"],"_btv_view_count":["3381"],"_bbp_subscription":["243698"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["38295"],"_bbp_forum_id":["27792"],"_bbp_engagement":["22555","164097","166871","169284","173228","175386"],"_bbp_voice_count":["6"],"_bbp_reply_count":["28"],"_bbp_last_reply_id":["148929"],"_bbp_last_active_id":["148929"],"_bbp_last_active_time":["2021-03-31 08:59:34"]},"test":"juwelmojumder1"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/38295","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\/38295\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=38295"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}