## Description

Besides heat transfer coefficient, heat transfer mechanism is greatly affected by particle size, which is specified by the keyword #PARTICLE_DIAMETER. The decrease in particle diameter means a larger surface area for the heat transfer between solid and fluid. This parameter is used in the heat transfer process such as local thermal non-equilibrium and gas-solid reactions.

## Parameters

int double

i.e. model type, particle diameter The model type is 1 to activate or 0 to deactivate the heat transfer model, followed by the particle diameter (in meter). In the example given below, the first value (i.e.) means the heat transfer model is activated, followed by the particle diameter i.e. 0.00005 meter.

## Example

#MEDIUM_PROPERTIES
. . .
$HEAT_TRANSFER 1 1000$PARTICLE_DIAMETER
1 0.00005
. . . .
#STOP