intro story D-Flow FM

 

D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
 
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 

 

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We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 
/web/delft3dfm/forum

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.

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** PLEASE TAG YOUR POST! **

 

 

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

 


Message Boards

Change the heat exchange model "Ocean" for ice

YD
yafei Duan, modified 2 Years ago.

Change the heat exchange model "Ocean" for ice

Youngling Posts: 10 Join Date: 9/28/14 Recent Posts
Hi,
The ice temperature is -1.8 ?;
I want to change heat exchange model "Ocean"
Since this model get the only water temperature above zero degree. However, for salty water, Sea, the water temperaure could be lower than 0.
I want to change it in the heatu.f90
However
when I change the code
from
"
else
if (qtotk > 0.0_fp) then
sour(nm, k0, ltem) = sour(nm, k0, ltem) + qtotk/(thick(k0)*h0old)
elseif (r0(nm, k0, ltem) >0) then
sink(nm, k0, ltem) = sink(nm, k0, ltem) - qtotk/(thick(k0)*h0new*r0(nm, k0, ltem))
elseif (r0(nm, k0, ltem) > 0.0_fp .and. r0(nm, k0, ltem) < 0.01_fp) then
!
! No addition to sink when the water temperature is lower than 0.01 degree.
!
else
msgcount = msgcount + 1
endif
endif
"
to
"
else
if (qtotk > 0.0_fp) then
sour(nm, k0, ltem) = sour(nm, k0, ltem) + qtotk/(thick(k0)*h0old)
elseif (r0(nm, k0, ltem) >-1.8) then
sink(nm, k0, ltem) = sink(nm, k0, ltem) - qtotk/(thick(k0)*h0new*r0(nm, k0, ltem))
!elseif (r0(nm, k0, ltem) > 0.0_fp .and. r0(nm, k0, ltem) < 0.01_fp) then
!
! No addition to sink when the water temperature is lower than 0.01 degree.
!
else
msgcount = msgcount + 1
endif
endif
"

There is no different result. and the water still could not decrease any more after dwon to 0.

Why?

Many thanks.
VM
Vahid Mohammadian, modified 1 Year ago.

RE: Change the heat exchange model "Ocean" for ice

Youngling Posts: 5 Join Date: 1/29/16 Recent Posts
Hi yafei

I faced a similar issue,

The temperature is about -2 in the domain that I am gonna simulate (because of highly saline sea water). But the model does not accept negative values for water temperature.

Did you find any solution?

Thanks
Vahid