Boundary setting in Scalar transport/ Bothers for 2 months

JOE BIN · July 9, 2018, 09:59

hello, foamers

~ i am get troubled for 2 months about boundary setting in Scalar transport

.
I want to simulate radon concentration diffusion in a laneway. The laneway has an inlet and an outlet, there is a radon source face in the end of the laneway. At present, I measured the radon concentration is 1500Bq/m3 (can translated to Kg/m3), so I want to make the concentration reach 1500Bq/m3 though the face source and to see the concentration distribution under identified airflow velocities.
I have tried many solvers.
Firstly, i used simpleFoam to make Velocity field convergence, and then I used tuburlentScalartransportForm (I added a turbulent effect to the CEqn) to simulate radon concentration diffusion, but the face is not diffused

.
Secondly, i thought maybe the solver is not right, then i complied a tubulentSimpleFoam (added a turbulent concentration CEqn), but it still not work.

this problem make me frustrated in two months, is anyone can help me ?

any advise is much appreciated

i simplified the model and upload the files.

JOE BIN · July 9, 2018, 10:01

JOE BIN · July 9, 2018, 10:09

July 9, 2018, 09:59	Boundary setting in Scalar transport/ Bothers for 2 months	#1
JOE BIN New Member ZHOU BIN Join Date: Apr 2018 Posts: 3 Rep Power: 8	hello, foamers~ i am get troubled for 2 months about boundary setting in Scalar transport. I want to simulate radon concentration diffusion in a laneway. The laneway has an inlet and an outlet, there is a radon source face in the end of the laneway. At present, I measured the radon concentration is 1500Bq/m3 (can translated to Kg/m3), so I want to make the concentration reach 1500Bq/m3 though the face source and to see the concentration distribution under identified airflow velocities. I have tried many solvers. Firstly, i used simpleFoam to make Velocity field convergence, and then I used tuburlentScalartransportForm (I added a turbulent effect to the CEqn) to simulate radon concentration diffusion, but the face is not diffused. Secondly, i thought maybe the solver is not right, then i complied a tubulentSimpleFoam (added a turbulent concentration CEqn), but it still not work. this problem make me frustrated in two months, is anyone can help me ? any advise is much appreciated i simplified the model and upload the files.

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July 9, 2018, 10:01		#2
JOE BIN New Member ZHOU BIN Join Date: Apr 2018 Posts: 3 Rep Power: 8

July 9, 2018, 10:09		#3
JOE BIN New Member ZHOU BIN Join Date: Apr 2018 Posts: 3 Rep Power: 8