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Suggested values for wave propagation
• - Maximum size of the domain should be 2-3 times wavelength
- Resolution; dp should be H/10 being H wave height.
- In the XML you should use:
coefh value="1.2 to 1.5"
StepAlgorithm value="2"
Kernel" value="2"
ViscoTreatment value="1"
Visco value="0.01"
ViscoBoundFactor value="0"
DeltaSPH value="0"
• I have a question about the maximum size of the domain, in the C.Altomare's paper(2015). A 35m wave tank was modelled and good agreement was obtained with theoretical results, how to account for it, thank you.
• Altomare's paper(2015)??
Do you mean the proceedings of SPHERIC2015:

there H=0.1, T=1.3s, d=0.27 which leads to L=1.89m
waves are going to be propagated properly for 3*1.89=5.67m

a wave tank of 4m is used (less than 5.67m) where a dissipative beach and sponge layer are introduced to avoid reflection

the wave tank of 35m is only used for checking since reflection is avoided for many senconds...

so as mentioned; 2-3 times wavelength is the maximum domain size where waves are well propagated
• Yes,it is. I established a wave tank with length 35m,parameters setted as above, there are many particles out ,which was beyond my expectation. Can you help me take a look at it?
• Sorry rieck I can not see you parameters
Note that this case is the same as provided in the package!!!
You only have to follow CaseWaves_REG.
But once again you have to create only wave tanks of 2-3 times the wavelength... we created a tank of 35 m but we only compute wave heights at x=2m

Regards
• Ok, I will try it again.Thank you

Best Regards
• Hi
Consider we want to measure Pressure at this problem of wave propagation.
1) By setting DeltaSPH value="0", then Pressure OSCILLATION occurs.
2) Is it better to use "laminar+SPS" instead of "artificial viscosity"?

Thanks!
• If you want to measure pressure then, you can use DeltaSPH.

Regards
• Thanks!
Where can I find the guide about DeltaSPH?
• The User Guide.
You should use artificial viscosity with the suggested value 0.01
• Thanks Alex!
What is wrong with using "SPS" instead of "artificial"?

Too much thanks!
• Dear friends !

I'm new to DualSPHysics, from the previous comments may I consider defining my domain as 1/10th of the actual domain ? if wave height, wave length and Depth are 3.5m, 112m and 17m, shall I consider them as 0.35, 11.2 (Tank size of 35m) and depth 1.7m?? similarly do we need to calculate other parameters like Tp, viscosity etc., ?

Further, Any video tutorials for creating the domain ?