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April 4, 2019, 04:04
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Temperature rise during endothermic reaction
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#1 |
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New Member
Mia
Join Date: Apr 2013
Posts: 3
Rep Power: 14  |
Hi!
 I'm trying to simulate the thermal decomposition(pyrolysis) of urea(CH4N2O) into ammonia(NH3) and isocyanic acid(HNCO). This is endothermic reaction, △H>0. However, in the result of this simulation, the temperature increases. (There is no heat source.) I defined the reference specific enthalpy -3.9e6 J/kg for urea, -4.75e5 J/kg for ammonia, -2.76e6 J/kg for isocyanic at 25 C and 1 atm. What should I check more to simulation the endothermic reaction? Thank you! |
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April 4, 2019, 06:27
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#2 |
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Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 18,011
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FAQ: https://www.cfd-online.com/Wiki/Ansy..._inaccurate.3F
Are you sure your simulation is converged?
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