CFD-Driven Optimization of a Bench-Scale Fluidized Bed Biomass Gasifier using MFiX-TFM and Nodeworks-OT

[myazgi]

Dear @YupengXu
What is the unit of the char gasification reaction rate model in the article. What is the pressure unit. What is the char concentration unit.

[YupengXu]

In MFiX the unit for different unit, CGS or SI:

For TFM (usr_rates.f): CGS: mol/s/cm3, SI: kmol/s/m3
For DEM/PIC (usr_rates_des.f): CGS：mol/s， SI: kmol/s

This work is done with TFM, so rate unit is kmol/s/m3.
Pressure unit is Pa

[YupengXu]

A link about the discussion of the unit in MFiX.

What is exactly the unit of reaction rate?

Hi, I was wondering what is the unit of reaction rate. I checked the user-guide 19.2, and it seems a little bit of confusing for me. [%E5%9B%BE%E7%89%87] What does the denominator “mol CH4” means? By the way, I also checked the 8.4.9 of user guide, it explains that all the unit of amount of substance is kmol rather than “mol”. [%E5%9B%BE%E7%89%87]