intro story Lake

Lake

Lakes and reservoirs are important resources for communities around the globe. They provide food, drinking and irrigation water and can also offer spots for recreation. Under certain conditions lakes can also represent a threat for local communities, such as flooding or limnic eruptions. The ecological state of shallow lakes may be hampered by suspended sediments due to wind driven currents and waves. In deep lakes, stratification can cause undesirable anoxic conditions in the deeper areas. Understanding these systems is crucial to enable a sound management of these water bodies.

 
Delft3D is the state-of-the-art modelling framework for hydrodynamics, water quality, ecology, waves and morphology.
 
Here, in this space, we share knowledge & experiences, and discuss issues related to modelling of lakes.

 

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Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems


 

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Modelling Thermal Only Discharge

U
James Tomlinson, modified 7 Years ago.

Modelling Thermal Only Discharge

Hi All,

I would like to know if it is possible to model an additional thermal source at a particular location? This is a source of heat only and not of any accompanying flow. For example a heat-exchanger or other warm surface submerged in the water column.

My thoughts so far are:
- Include my additional heat in a modified user provided surface heat input file. However I want to control where the additional heat is inputted in the column, i.e. which layer.
- Include both an intake and outfall in the same cell that cause no net change in mass, but do provide a delta in heat/temperature. I wonder if this would work or whether the numerical scheme would not like it. I think the intake and outfall would need to be linked, i.e. a power station?
- Modify the source code somewhere to add my additional input. This might be tricky... ?


Regards,
James
Qinghua Ye, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi James,

I guess you can try by this way,

1. Specify an intake and an outfall in the same cell, at the same or different layer.
2. The volume of intake and the outfall are the same, only the temp is different.
3. I would not expect any code modification since the functions should be there already unless you encounter some problem already?

Keep us update here and good luck!

Regards,

Qinghua YE
Adri Mourits, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

Yoda Posts: 1212 Join Date: 1/3/11 Recent Posts
Hi James,

As addition on Qinghua's answer:

Look for "power station" in the manual.

Attached are an example src- and dis- file.

Regards,

Adri
U
James Tomlinson, modified 7 Years ago.

RE: Modelling Thermal Only Discharge

Thanks I'll give this a try. I guess my query was whether anything bad would happen if a Power station had intake and outfall in the same location?
Adri Mourits, modified 7 Years ago.

RE: Modelling Thermal Only Discharge (Answer)

Yoda Posts: 1212 Join Date: 1/3/11 Recent Posts
Hi James,

I'm sorry we missed that part of your question.

The intake and the outfall are handled separately, so I don't expect problems when they are in the same location.

Regards,

Adri