In a beach face, the point where the sea level meets the beach face is critical under tidal effect. Above the point, a seepage face is used. Below the point, the seaward boundary section is subjected to the specified-head boundary given by the seawater depth and time variable. To capture the key point, the expression editor in Feflow may be used. But how to express the above situation in the expression editor, or other methods?
Hi Fang,
There are 2 ways.
The first is to develop Feflow plugin in IFM API to modify runtime boundary conditions for nodes with elevations in the sea level range. Try to implement the trigger logic to turn off the sea boundary where it is below elevation of node.
The second. You can create time series for modulation functions. There you can also set the trigger logic as value of 1 for the sea level > elevation of node and gap (turn off ) for the sea level < elevation of node. The modulation function property is available by right button click and choose @Add Parameter@.
For both cases please consider the compensation for salt water density:
= (Elevation ) * g * (Salt Water Density - Fresh Water Density)
Hi Yunhai Fang ,
I wonder if you solved this problem for your model. I'm facing the same problem for my 3D groundwater model for an Island. I need to assign time series to island boundaries for my model to account for tidal effects. I'd appreciate it if you could have any idea about the available plug-ins or about how to write one for this kind of problem.
- Badges
- Science topic
- Similar topics
- Filing