hello

i am a beginner of fluent. Hope to obtain your help!

i want to simulate the concentration of toxic gas and airflow pattern in a building(toxic gas is released through a inlet into the building). Would you like to tell me:

1)what kind of model should i use in fluent? can i choose species transport?

2)how to obtain the plot of airflow pattern?

3)how to set the boundary conditon?

4)what is trajectory?

Thanks very much for your help!

lily

Please help me! thanks a lot!