Wind drag coefficient - D-Flow Flexible Mesh - Delft3D
intro story D-Flow FM
D-Flow Flexible MeshD-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:
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!
======================================================= | Sub groups
|
Message Boards
Wind drag coefficient
Fernando Barreto, modified 7 Years ago.
Wind drag coefficient
Padawan Posts: 74 Join Date: 6/21/12 Recent Posts 00
I am performing simulations in a region heavily affected by wind. And I would like to use other approach for calculating the wind drag coefficient. So I wonder which part of the code, in which routine, is responsible for reading and interpolation the Cd values given in . Mdf file. I would try to test another approach for calculating it.
Thanks
Fernando
Thanks
Fernando
MS
Mihael Souza, modified 7 Years ago.
RE: Wind drag coefficient
Padawan Posts: 65 Join Date: 10/11/12 Recent Posts 00
Hi Fernando,
In the MDF file you can specify the wind drag through three breakpoints.
As I understand, these specified values are the ones that are going to be used in the computation.
In this case, you can calculate the wind drags by any means (the manual suggests the equations of Smith & Banke, 1975), and define the breakpoints (i.e. wind speeds) that are going to be used.
Hope this helps,
Kind regards,
Mihael Souza.
In the MDF file you can specify the wind drag through three breakpoints.
As I understand, these specified values are the ones that are going to be used in the computation.
In this case, you can calculate the wind drags by any means (the manual suggests the equations of Smith & Banke, 1975), and define the breakpoints (i.e. wind speeds) that are going to be used.
Hope this helps,
Kind regards,
Mihael Souza.
Fernando Barreto, modified 7 Years ago.
RE: Wind drag coefficient
Padawan Posts: 74 Join Date: 6/21/12 Recent Posts 00
Mihael, in fact I think that the only way is using the equation that is on page 212 of flow manual. I'm trying to discover in what routine is this equation programmed. Thank you for your help.
Fernando
Fernando