Heat transport in porous media_Boundary conditions_Units

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#1

Hello everyone,

I build up a 1x1 squared enclosure with thermal dispersion in a porous media.

I oriented myself in the elder benchmark problem 5 “OGS-CES-I-E10 Watanabe Heat convection in a porous medium” within the book “OpenGeoSys Tutorial Basics of Heat Transport Processes in Geothermal Systems“

My model therefore, contains also liquid flow and heat transport.

I have a question concerning the boundary conditions and material parameters.

The benchmark problem has on the TOP a constant Temperature of 0°C and on the BOTTOM_HALF_RIGHT a constant Temperature of 1 °C.

They use in the BC file also the unit °C but all the other parameters in the other files are given in Kelvin.

So, my question is: Is it possible to do that?

I tried to change the BC into Kelvin but then I get unreasonable results. When I changed it back everything is fine.

My model based on the benchmark problem, so I get the same problem concerning the units in the BC file

If I use Celsius in the BC file and all the other parameters in Kelvin the results looks fine but by changing the values in Kelvin I get a rejected time steps.

I hope you can help me.

Greetings,

Tuong Vi

PS: Sorry, for my msp file. It couldn’t be upload in the original shape.

ma01.bc (618 Bytes)

ma01.gli (291 Bytes)

ma01.ic (343 Bytes)

ma01.mfp (160 Bytes)

ma01.mmp (196 Bytes)

ma01.msh (6.25 KB)

ma01.out (133 Bytes)

ma01.pcs (152 Bytes)

ma01.tim (376 Bytes)

ma01.num (509 Bytes)

msp.txt (122 Bytes)

#2

Hi,

In your input files, IC and MFP (fluid density model) files should also be changed.

best,
nori

···

On 08/01/2017 10:52 PM, 'Tuong Vi Tran' via ogs-users wrote:

Hello everyone,

I build up a 1x1 squared enclosure with thermal dispersion in a porous media.

I oriented myself in the elder benchmark problem 5 “OGS-CES-I-E10 Watanabe Heat convection in a porous medium” within the book “OpenGeoSys Tutorial Basics of Heat Transport Processes in Geothermal Systems“

My model therefore, contains also liquid flow and heat transport.

I have a question concerning the boundary conditions and material parameters.

The benchmark problem has on the TOP a constant Temperature of 0°C and on the BOTTOM_HALF_RIGHT a constant Temperature of 1 °C.

They use in the BC file also the unit °C but all the other parameters in the other files are given in Kelvin.

So, my question is: Is it possible to do that?

I tried to change the BC into Kelvin but then I get unreasonable results. When I changed it back everything is fine.

My model based on the benchmark problem, so I get the same problem concerning the units in the BC file

If I use Celsius in the BC file and all the other parameters in Kelvin the results looks fine but by changing the values in Kelvin I get a rejected time steps.

I hope you can help me.

Greetings,

Tuong Vi

PS: Sorry, for my msp file. It couldn't be upload in the original shape.

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#3

Hi,

thank you for your help!
It is working now.

And may I ask you another question?
In the solid properties I want to change my density to 4 a fluid density model (temperature dependent)
Do I have to give them as well another value ?
like in the fluid property file it is the beta value?

Best,
tvi

···

Am Mittwoch, 2. August 2017 00:38:49 UTC+2 schrieb Norihiro Watanabe:

Hi,

In your input files, IC and MFP (fluid density model) files should also
be changed.

best,
nori

On 08/01/2017 10:52 PM, ‘Tuong Vi Tran’ via ogs-users wrote:

Hello everyone,

I build up a 1x1 squared enclosure with thermal dispersion in a porous
media.

I oriented myself in the elder benchmark problem 5 “OGS-CES-I-E10
Watanabe Heat convection in a porous medium” within the book “OpenGeoSys
Tutorial Basics of Heat Transport Processes in Geothermal Systems“

My model therefore, contains also liquid flow and heat transport.

I have a question concerning the boundary conditions and material
parameters.

The benchmark problem has on the TOP a constant Temperature of 0°C and
on the BOTTOM_HALF_RIGHT a constant Temperature of 1 °C.

They use in the BC file also the unit °C but all the other parameters in
the other files are given in Kelvin.

So, my question is: Is it possible to do that?

I tried to change the BC into Kelvin but then I get unreasonable
results. When I changed it back everything is fine.

My model based on the benchmark problem, so I get the same problem
concerning the units in the BC file

If I use Celsius in the BC file and all the other parameters in Kelvin
the results looks fine but by changing the values in Kelvin I get a
rejected time steps.

I hope you can help me.

Greetings,

Tuong Vi

PS: Sorry, for my msp file. It couldn’t be upload in the original shape.

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