[hmdl]

Hi everyone,

I'm simulating particle-laden flow in a hot jet flow in CFX, steady state, particle morphology-Particle Transport Solid. As a result I get particle trajectories, their velocity and temperature at eat point on these trajectories. Now my problem is that it is assumed in CFX that particles are heated uniformly and the temperature value applies to the whole particle volume. The result of my simulations should be the temperature gradients inside the particles. Usually, because of very small size of the particles heat conduction inside a particle is neglected and it is safe to assume that the particle is heated uniformly. But in my case jet velocity and temperature are so high that a particle can be melted on the outside and still be cold on the inside.

To tackle this problem I can think of two approaches. One approach would be to implement in CFL the solution of a heating of a sphere depending on the local temperature of the ambient gas, relative velocity of gas to particle and material properties and let CFX compute the gradients for each time step for each particle.
Another way would be creating a separate simulation in workbench for transient heating of a sphere problem (strongly reduced problem to save time). This should be solved for each particle with different size, ambient temperature and velocity. I would be glad if anyone could advice on which method is better to get the temperature gradients inside the particles.

Best Regards,
hmdl