Evaluation of the surface tension of magnetic surfactants on a complex surface

Question 1 - How do we evaluate the surface tension of magnetic surfactants on a complex surface… What studies (if any has been done on this ) -- Cite 3-4 sources. Question 2 - How do we study the cleaning of surfactants by different approaches: 1. Capillary rise method 2. Stallagmometer method – drop weight method 3. Wilhelmy plate or ring method 4. Maximum bulk pressure method. 5. Methods analyzing shape of the hanging liquid dr op or gas bubble. 6. Dynamic methods   Question 3 : What does Flow rate and Viscosity have to do with surface tension . Part 4 : ½ page over view of Capillary Method to define Surface Tension These are a few cites that you may want to look at .. But just a few suggestions. http://www.niser.ac.in/sps/sites/default/files/basic_page/Surface%20tension%20by%20capillary%20rise%20method_%202018.pdf https://www.teachengineering.org/lessons/view/duk_surfacetensionunit_less2 http://zzm.umcs.lublin.pl/Wyklad/FGF-Ang/2A.F.G.F.%20Surface%20tension.pdf