# heat transfer to a batch reactor

 Register Blogs Members List Search Today's Posts Mark Forums Read

 April 24, 2001, 22:46 heat transfer to a batch reactor #1 siva Guest   Posts: n/a hi all, can anyone tell me how do i set up a batch reator with heating of the reactants(unsteady state problem). i dont quite understand how i can use fluent to solve this non-flow problem. siva

 April 26, 2001, 15:20 Re: heat transfer to a batch reactor #2 Lanre Guest   Posts: n/a What is your source of thermal energy? Regardless, if you can quantify this, then you can define an energy source term (in W/m3) and apply this source term to your fluid zone (or subset of the fluid zone). Solve as a time-dependent problem.

 April 27, 2001, 14:00 Re: heat transfer to a batch reactor #3 siva Guest   Posts: n/a thanks for the clarification, my source will be an electrical heater immersed in the reactor. could u please tell me how do i create a subset of the fluid zone(my problem is i need to heat the contents of a reactor which occupy 80% of the volume of the reactor to a certain temperature-i need to find the time taken for for various energy sources). thanks for you help. siva

 April 27, 2001, 16:50 Re: heat transfer to a batch reactor #4 Lanre Guest   Posts: n/a As you previously indicated, this problem can be easily solved by assuming that the reactor is well mixed using heat balance (1st order ODE- see Seborg, Edgar, Mellichamp, "Process Dynamics and Control", Wiley, 1989...and many others). Hence, you do not really need CFD to solve this problem. However, if you would like to use CFD, as my implement my original suggestion implied, do the following: 1. if your reactor grid is complete, mark the region of the grid you would like to apply the source, using Adapt-->Region. This will give you approximately the subvolume you want and will only work neatly if your grid is hex. 2. if your reactor model is not built yet, create the sub-volume during the meshing process. Once you have a separate fluid zone, you can apply the energy source term through the Define-->Boundary Conditions... panel. Solve as an unsteady problem, and plot the average temperature in the main volume as a function of flow time (Solve-->Monitors-->Surface..)

 April 28, 2001, 13:14 Re: heat transfer to a batch reactor #5 sivakumar Guest   Posts: n/a thanks a lot, that worked. sivakumar

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post Attesz CFX 7 January 5, 2013 04:32 motahar CFX 2 August 3, 2010 04:04 enigma Main CFD Forum 2 November 1, 2009 23:53 B.Simon CFX 3 October 28, 2008 19:53 Mark CFX 6 November 15, 2004 16:55

All times are GMT -4. The time now is 05:34.