{"id":458490,"date":"2026-05-19T21:48:58","date_gmt":"2026-05-19T21:48:58","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/coefficient-of-pressure-on-surfaces\/"},"modified":"2026-05-19T21:50:31","modified_gmt":"2026-05-19T21:50:31","slug":"coefficient-of-pressure-on-surfaces","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/coefficient-of-pressure-on-surfaces\/","title":{"rendered":"Coefficient of pressure on surfaces"},"content":{"rendered":"<p>&lt;p&gt;&lt;p data-start=&#8221;92&#8243; data-end=&#8221;442&#8243;&gt;Hey,&lt;br&gt;&lt;br&gt;I am trying to reproduce pressure coefficients from a CFD study on inclined ground-mounted solar PV panels using standard\/ RNG&nbsp;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;k&ndash;&epsilon;&lt;\/span&gt;&lt;\/span&gt;&nbsp;model. &lt;br&gt;My panel-face &lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;y+ &lt;\/span&gt;&lt;\/span&gt;is within the recommended wall-function range, around 30 to 300, but the surface pressure\/Cp values on my panel are still lower than the reference paper.&lt;\/p&gt;&lt;p data-start=&#8221;444&#8243; data-end=&#8221;660&#8243;&gt;The paper reports relatively high net pressure coefficients in the range of 0.75 max for the top panel and -0.5 to -0.75 on the back panel.&nbsp;&lt;br&gt;I have checked the mesh&nbsp;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;y+&lt;\/span&gt;&lt;\/span&gt;, but I am still not matching their Cp levels.&lt;\/p&gt;&lt;p data-start=&#8221;662&#8243; data-end=&#8221;975&#8243; data-is-last-node=&#8221;&#8221; data-is-only-node=&#8221;&#8221;&gt;What could cause lower Cp values in my simulation, even when the turbulence model and &lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;y+&lt;\/span&gt;&lt;\/span&gt; range seem similar?&nbsp;&lt;br&gt;&lt;br&gt;This is the paper&#8217;s name, I&#8217;m specifically concerned about the Figure 7a. for H0.&lt;br&gt;AERODYNAMIC AND STRUCTURAL ANALYSIS OF ASOLAR PANEL &#8211; Yemenici, O. &amp; Oruc, E. nt j simul model 24 (2025) 2, 191-202&lt;br&gt;&lt;br&gt;&lt;br&gt;&lt;br&gt;My analysis is that the model is probably predicting low static pressure on the surface and hence a lower cp value&lt;br&gt;<img decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2026\/05\/19-05-2026-1779227129-mceclip1.png\" \/>&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-458490","topic","type-topic","status-publish","hentry","topic-tag-coefficient-of-pressure-1","topic-tag-k-epsilon"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27792"],"_bbp_topic_id":["458490"],"_bbp_subscription":["288381"],"_bbp_author_ip":["2607:fea8:7bdb:5c00:b02a:eaa8:a11e:6fa0"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["458490"],"_bbp_last_active_time":["2026-05-19 21:48:58"],"_bbp_reply_count":["0"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["1"],"_bbp_engagement":["288381"],"_btv_view_count":["17"],"_bbp_topic_status":["unanswered"],"_edit_last":["288381"],"_bbp_revision_log":["a:1:{i:458491;a:2:{s:6:\"author\";i:288381;s:6:\"reason\";s:0:\"\";}}"]},"test":"kiran-purushothamakeshavanontariotechu-net"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458490","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":1,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458490\/revisions"}],"predecessor-version":[{"id":458491,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/458490\/revisions\/458491"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=458490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}