# Packed Bed Reactor

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 April 2, 2007, 07:30 Packed Bed Reactor #1 shankar reddy Guest   Posts: n/a Hi all, I am doing a project regading Packed Bed Reactor. And i have done 2d case very easily now the problem with 3d case. I am not getting how to create a geometry and meshing for packed bed reactor in GAMBIT.I need to insert solid spheres in cylinder. And i need to specify two phases like solid as well as liquid. if any one know about this pls help me. with advance, Thank you very much Mechanical Engineer likes this.

 April 6, 2007, 14:23 Re: Packed Bed Reactor #2 margaret mkhosi Guest   Posts: n/a Can you explain more on the actual problem you are solving, maybe I can help. I have modeled a pebble bed in Gambit even though it was not in a cylinder.

 April 7, 2007, 14:37 Re: Packed Bed Reactor #3 shankar Guest   Posts: n/a Thank u for your response Margaret, my packed bed contain the following specifications. length of the column-1m and diameter of the column-5.5cm packings diameter -16cm(sphere) here i finished my geometry with like an structured packing.. like i arranged the down rows with 4 spheres in square format arrangement, and then i arranged next row of spheres at center of the squares of the below row... while i was going to this packing one of my friend suggested me to give the orientation of 6 or 7 degrees to spheres like tat.. how to do that? And then which type of meshing will be preferable for packings (spheres) and cylinder for getting fine grid. thank u sir,for taking interest to clarify my doubts and spending your valuable time to me. shankar

 April 8, 2007, 10:47 Re: Packed Bed Reactor #4 margaret mkhosi Guest   Posts: n/a Shankar, I have found out from my case that unstructured mesh works best. Also, are the spheres in contact with each other, if so, you may need to separate them a little bit. One approach that I found helpful was to determine symmetry of the model and maybe just model a small portion of the bed, like one-fourth or even one-eighth of the model, that way you will deal with smaller mesh that Gambit can handle. You may also want to use size-functions in order to handle the gaps between the pebbles as well as to have very fine mesh near the walls. I hope this helps.

June 30, 2012, 02:01
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 Originally Posted by shankar reddy ;140569 Hi all, I am doing a project regading Packed Bed Reactor. And i have done 2d case very easily now the problem with 3d case. I am not getting how to create a geometry and meshing for packed bed reactor in GAMBIT.I need to insert solid spheres in cylinder. And i need to specify two phases like solid as well as liquid. if any one know about this pls help me. with advance, Thank you very much
shankar reddy i am doing project in packed bed reactor (gas phase on catlyst) in 2d.please tell me the step how to make geometry in ansys12. it is necessary to make catlyst in ractangle in 2d. please tell me the complete step of modeling

 October 14, 2013, 04:39 #6 New Member   Bhavin Shah Join Date: Sep 2013 Posts: 2 Rep Power: 0 Can anybody tell me how can i create a random packed bed with spheres inserted in the cylinder using Gambit ????? My D/dp ratio is 5. This thing can be done in STAR-CCM+ but I don't have an access. So if somebody can tell me where can I download it ? bhavinshah36@gmail.com Please help seniors

March 2, 2014, 10:52
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Rahul omar
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Quote:
 Originally Posted by shankar reddy ;140569 Hi all, I am doing a project regading Packed Bed Reactor. And i have done 2d case very easily now the problem with 3d case. I am not getting how to create a geometry and meshing for packed bed reactor in GAMBIT.I need to insert solid spheres in cylinder. And i need to specify two phases like solid as well as liquid. if any one know about this pls help me. with advance, Thank you very much
can you help me 2D.

 March 2, 2014, 10:57 #8 New Member   Rahul omar Join Date: Aug 2013 Posts: 12 Rep Power: 3 please help me packed bed reactor geometry and mesh

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