{"id":382816,"date":"2024-09-16T19:52:11","date_gmt":"2024-09-16T19:52:11","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/want-to-know-how-to-set-a-specific-concentration-in-an-area\/"},"modified":"2024-09-16T19:52:11","modified_gmt":"2024-09-16T19:52:11","slug":"want-to-know-how-to-set-a-specific-concentration-in-an-area","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/want-to-know-how-to-set-a-specific-concentration-in-an-area\/","title":{"rendered":"Want to know how to set a specific concentration in an area"},"content":{"rendered":"<p>&lt;p&gt;Hi, i&#8217;m a beginner to ansys fluent, i&#8217;m trying to simulate the following system:&lt;\/p&gt;&lt;p&gt;i have a titanium nanotube in which there is a solution of water + sodium naproxene, at the exit of the nanotube i have just water.&lt;\/p&gt;&lt;p&gt;what i want to simulate is the mass diffusion of this molecule outside the nanotube and in the water.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;the problem is that i&#8217;m not able to set the concentration of the molecule in the nanotube at a fixed value at time=0, in this way i&#8217;ll be able to appreciate the elution of the molecule from the nanotube in the water. Actually i&#8217;m only able to set a constant value of the concentration at the wall or in a area by using a patch, by this way the concentration is kept constant for all the simulation and doesn&#8217;t change in the nanotube, even if the diffusion and elution occurs.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382816","topic","type-topic","status-publish","hentry","topic-tag-mass-diffusion","topic-tag-species-diffusion"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hi, i&#039;m a beginner to ansys fluent, i&#039;m trying to simulate the following system:i have a titanium nanotube in which there is a solution of water + sodium naproxene, at the exit of the nanotube i have just water.what i want to simulate is the mass diffusion of this molecule outside the nanotube and in\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" 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