{"id":55097,"date":"2017-10-17T05:46:32","date_gmt":"2017-10-17T05:46:32","guid":{"rendered":"\/forum\/forums\/reply\/55097\/"},"modified":"2017-10-17T05:46:32","modified_gmt":"2017-10-17T05:46:32","slug":"55097","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/55097\/","title":{"rendered":"Reply To: Calculate the unburnt char in a CFX coal combustion calculation"},"content":{"rendered":"<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">&bull;Please start the calculation with the option Output Control -&gt; Results -&gt; Extra Output Variables List &bull;Choose one variable for every Particle group you defined. &bull;Please choose any variable but Volume Fraction. This option activates an internal hook to write the mass flow variable of the particle tracks into the result file. &bull;You can evaluate the mass flow of the particles within your domain similar to the Eulerian phase variables. &bull;In ANSYS CFX please do the following (assuming HC Fuel as particle material name): &bull;Generate an Expression CharMassflowCalc = HC Fuel.Mass Flow * HC Fuel.Char.Mass Fraction &bull;Generate a variable referencing the Expression: Char Mass flow = CharMassflowCalc &bull;Create a plane where you want to calculate the massflow &bull;Bound the plane if necessary (Plane definition -&gt; Geometry tab -&gt; Plane Bounds) &bull;You can set the center of the bounding box if the plane is set by three points &bull;The first point specifies the center. &bull;Sum up the variable Char Mass flow over the plane: sum(Char Mass flow)@plane 1<\/span><\/p>\n","protected":false},"template":"","class_list":["post-55097","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=\"\u2022Please start the calculation with the option Output Control -&gt; Results -&gt; Extra Output Variables List \u2022Choose one variable for every Particle group you defined. \u2022Please choose any variable but Volume Fraction. 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