{"id":359747,"date":"2024-03-31T23:59:00","date_gmt":"2024-03-31T23:59:00","guid":{"rendered":"\/forum\/forums\/reply\/359747\/"},"modified":"2024-03-31T23:59:00","modified_gmt":"2024-03-31T23:59:00","slug":"359747","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/359747\/","title":{"rendered":"Reply To: How can I give different transmissivity with more than 3 wavelength region?"},"content":{"rendered":"<p>&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Hello Sir, Thank you for the reply and please find the screenshots below :&nbsp;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;Given that the acceleration due to gravity is set in the Y-direction (g&lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-mathml&#8221;&gt;=&minus;9.81 m\/s2&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;), indicating that gravity acts downwards, the positive Y-direction should be oriented upwards. Therefore, for natural convection modeling in this scenario, the direction of the beam for semi-transparent material should be &lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-html&#8221; aria-hidden=&#8221;true&#8221;&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord mathnormal&#8221;&gt;X&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;=&lt;\/span&gt;&lt;\/span&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord&#8221;&gt;0&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;,&lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-html&#8221; aria-hidden=&#8221;true&#8221;&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord mathnormal&#8221;&gt;Y&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;=&lt;\/span&gt;&lt;\/span&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord&#8221;&gt;1&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;, and&nbsp;&lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-html&#8221; aria-hidden=&#8221;true&#8221;&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord mathnormal&#8221;&gt;Z&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;=&lt;\/span&gt;&lt;\/span&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord&#8221;&gt;0 or &lt;span class=&#8221;mord mathnormal&#8221;&gt;X&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;=&lt;\/span&gt;0,&lt;span class=&#8221;mord mathnormal&#8221;&gt;Y&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;= -&lt;\/span&gt;1, and&nbsp;&lt;span class=&#8221;mord mathnormal&#8221;&gt;Z&lt;\/span&gt;&lt;span class=&#8221;mrel&#8221;&gt;=&lt;\/span&gt;0?&nbsp;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;&lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-html&#8221; aria-hidden=&#8221;true&#8221;&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/31-03-2024-1711929499-Beam direction.PNG\" alt=\"\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;&lt;p&gt;&lt;span style=&#8221;font-size: 12pt;&#8221;&gt;&lt;span class=&#8221;math math-inline&#8221;&gt;&lt;span class=&#8221;katex&#8221;&gt;&lt;span class=&#8221;katex-html&#8221; aria-hidden=&#8221;true&#8221;&gt;&lt;span class=&#8221;base&#8221;&gt;&lt;span class=&#8221;mord&#8221;&gt;<img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/31-03-2024-1711929525-Acc. due to Gravity.PNG\" alt=\"\" \/>&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/span&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-359747","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello Sir, Thank you for the reply and please find the screenshots below : Given that the acceleration due to gravity is set in the Y-direction (g=\u22129.81 m\/s2), indicating that gravity acts downwards, the positive Y-direction should be oriented upwards. 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