UDS diffusivity

chuanyue · November 5, 2009, 01:56

Hi there,

I am solving one UDS in different zones(fliud and solid zone),

now the diffusion coefficients are different in two zones.

I want to kown is it possible to specify two diffusivities for one UDS in different domain?And what should I do to specify?

thanks a lot!

rabirabi · November 8, 2016, 15:52

Hi there,

I am solving one UDS in two different speices (air+water),

now the diffusion coefficients of UDS is different in two species.

The diffusion coefficient of UDS in Air egale: Dair=1.1 e-5

The diffusion coefficient of UDS in water egale Dwater=1.2 e-9

I want to kown is it possible to specify two diffusivities for one UDS in different species ?And what should I do to specify?

thanks a lot!

rabirabi · November 8, 2016, 17:40

Hi there,

I am solving one UDS in two different speices (air+water),

now the diffusion coefficients of UDS is different in two species.

The diffusion coefficient of UDS in Air egale: Dair=1.1 e-5

The diffusion coefficient of UDS in water egale Dwater=1.2 e-9

I want to kown is it possible to specify two diffusivities for one UDS in different species ?And what should I do to specify?

thanks a lot!

schwaral · December 12, 2020, 11:47

hey did you find a solution?

November 5, 2009, 01:56	UDS diffusivity	#1
chuanyue New Member Join Date: Oct 2009 Posts: 6 Rep Power: 16	Hi there, I am solving one UDS in different zones(fliud and solid zone), now the diffusion coefficients are different in two zones. I want to kown is it possible to specify two diffusivities for one UDS in different domain?And what should I do to specify? thanks a lot!

November 8, 2016, 15:52	UDS diffusivity	#2
rabirabi New Member Join Date: Nov 2016 Posts: 5 Rep Power: 9	Hi there, I am solving one UDS in two different speices (air+water), now the diffusion coefficients of UDS is different in two species. The diffusion coefficient of UDS in Air egale: Dair=1.1 e-5 The diffusion coefficient of UDS in water egale Dwater=1.2 e-9 I want to kown is it possible to specify two diffusivities for one UDS in different species ?And what should I do to specify? thanks a lot!

November 8, 2016, 17:40	UDS diffusivity	#3
rabirabi New Member Join Date: Nov 2016 Posts: 5 Rep Power: 9	Hi there, I am solving one UDS in two different speices (air+water), now the diffusion coefficients of UDS is different in two species. The diffusion coefficient of UDS in Air egale: Dair=1.1 e-5 The diffusion coefficient of UDS in water egale Dwater=1.2 e-9 I want to kown is it possible to specify two diffusivities for one UDS in different species ?And what should I do to specify? thanks a lot!

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December 12, 2020, 11:47		#4
schwaral Member Deutschland Join Date: Jun 2020 Location: https://t.me/pump_upp Posts: 43 Rep Power: 5	hey did you find a solution?