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Hello, could someone please confirm the wave direction convention used in the artemis input and also in the output result files (wave incidence), am I correct in thinking for waves going in the direction of...


Direction Input Output

North 90 90
East 0 0
South 270 -90
West 180 -180/+180


Many thanks

Oliver

Hi Oliver,

I had this problem as well. Have a look at this previous post of mine.

Applying the trigonometrical convention, the angle for waves propagating towards the:

• North is 90
• East is 0
• South is 270
• West is 180

This convention is kept the same for the presentation of results. Keep in mind that you may have reflections within your model that might cause a change in wave incidence.

Regards,
Costas

Hi Costas,

Thanks for confirming my thoughts. The values of wave incidence in
my output file range from -180 to +180, across a fairly large domain where reflection is only important in a small region, so I am wondering if the wave incidence values are due to wave reflection.

Regards

Oliver

Hi,

In my experience, Artemis could get a bit tricky in larger domains because it gets difficult to define boundary reflections accurately. If it is a small area that reflections are important, you could split your model area between Tomawac and Artemis, so that Tomawac handles propagation and Artemis reflection.

Costas

Ok, thanks for your advice. I have created various domain sizes, with incident wave type (1) for liquid boundary nodes so that waves enter and exit freely. There a various reflecting objects extending from the coast. My largest domain is 1600m x 800m to try to determine the effects of wave reflection, diffraction, refraction on the surrounding coast. I'm not sure I'll be able to do this by combining Artemis and Tomawac.

Thanks

Oliver