[mertcn]

Hi everybody,


I'm simulating methanol synthesis with Eddy Break-up model in Starccm+. The reaction happens only between 220°C and 280°C. How can I give a condition in eddy break-up model that the reaction happens only between these temperature? At the moment, the larger tempeture is the higher the occurance of methanol in my simulation and it is a little bit weird

[cwl]

Probably - by setting up temperature-dependent reaction rate?

[mertcn]

I'm using of so old reaction kinetic equation from Bussche. I defined the equation as field function. But, there isn't any temperature limit in reaction rate calculation. I should define it somehow in Starccm, I think. For example, there is an option in complex chemistry model for lowest temperature for occuring reaction. I need this kind of option in eddy break-up model

[cwl]

(220+273.15 < ${Temperature}) && (${Temperature} < 280+273.15)
?
Your reaction rate
:
0

PS Default units for temperature are K. You can use Celcius as following: <220 C> instead of 220+273.15.

[mertcn]

My reaction rate is more complex. It seems like this (see the image).

But, are you suggesting that I will put a condition for reaction with (220+273.15 < ${Temperature}) && (${Temperature} < 280+273.15)? If yes, how can I do that?

[cwl]

But, are you suggesting that I will put a condition for reaction with (220+273.15 < ${Temperature}) && (${Temperature} < 280+273.15)?
If yes, how can I do that?

Just type your Field Function defined formula (from the image) between ? and :

[mertcn]

it worked. Thank you very much