Talk:Wake (physics)

message: If you are offended by the note in the text about the offline link, feel free to move it here, but I did want to catch people's attention to the odd, archival link that a {dlw} template will leave.  I'm not sure if the site will be back up, but the note seemed to indicate so.  Pax.  --KJPurscell 00:58, 20 July 2006 (UTC)
thread_title: The NDSL Link

message: This section is difficult to read and understand, mainly because it refers to a non existent scheme. The positions of letters A,B,C,D and source would be much clearer with this scheme. Can someone do that ?
Johnnywayne2010 (talk) 10:20, 16 April 2012 (UTC)
thread_title:  Wake pattern of a boat : scheme 

message: Addressing the classic simple, lovely, derivation of the Kelvin wake statement I inserted in section 2,
:A concise  geometric construction demonstrates that, strikingly,  this group shock angle w.r.t. the path of the boat, 19.47°,  for any and all of the above  , is actually independent of , , and ; it merely relies on the fact that  the group velocity is half of the phase velocity . On any planet, slow-swimming objects have "effective Mach number" 3! 
and the Figure that section had and disappeared by dint of obscurity, I wonder if anyone expert in figure drawing could contribute to Wikimedia the equivalent of Fig 12.2 (and perhaps 12.3) of the classic ref
provided, G.B. Whitham (1974). Linear and Nonlinear Waves (John Wiley & Sons Inc., 1974) pp 409-410 Online scan.    Specifically,    Figs12.2 & 12.3
They are ancient, so nobody in his right mind could claim copyright, etc... If one did draw this drawing, I would further recommend, indeed, beg, that he also draw a short circular arc of the circle centered at Q with radius QS, so the osculation of the tangent PS on S is evident, justifying the right angle discussed.  With such a figure available, I could then easily adduce a Hidebox with the concise argument, detailing how the semi-circle with diameter PQ is the locus of all ψs, hence all ks, vs, etc... and so does not depend on their individual values, and thus stanch the terrible, terrible misconceptions demonstrated at the top of the page....  Cuzkatzimhut (talk) 12:36, 30 January 2016 (UTC)
replies: text: So, basically you are asking for the diagrams 12.2 and 12.3 to be drawn and uploaded to WP. It should be no problem, diagrams can be adapted from books and uploaded to WP provided they are sourced (to where they were adapted from). I'll try later today. M∧Ŝc2ħεИτlk 09:23, 31 January 2016 (UTC)
replies: text: Done, are these OK? Should have I included the wavevector k in them to show the direction of wave propagation? M∧Ŝc2ħεИτlk 10:19, 31 January 2016 (UTC)

text: Thanks, and no problem ^_^ M∧Ŝc2ħεИτlk 12:44, 31 January 2016 (UTC)
thread_title: Plea for graphing help regarding the Kelvin wave pattern 

message: Singaporean IPs  155.69.125.175 ,  ‎155.69.192.107 , serially insert inappropriate references in an inappropriate location, despite repeated warnings to cease and desist:
The section deals with surface object  water-wave wakes, not submerged source ones as in the vanity references spatchcocked here.  
I tried to accommodate the hankering for vanity referencing involved, but the IP malefactor clearly believes serial reverts are too easy to resist. I propose requesting blockage of disruptive IPs Cuzkatzimhut (talk) 17:22, 6 February 2016 (UTC)
replies: text: An admin would have to provide autoconfirm user protection, which stops IPs from editing but allows ordinary editors to edit. I geuss here is the place to do it. M∧Ŝc2ħεИτlk 17:26, 6 February 2016 (UTC)
replies: text: Thanks! We might be dealing with simple ignorance of how transparent this Nanyang Technological University malefactor is. His latest edit was inoffensive, so I suppose we can watch his actions for a while, before  an event is triggered. Cuzkatzimhut (talk) 17:34, 6 February 2016 (UTC)
thread_title: Disruptive editing on "Marangoni waves" asides

message: Some time ago, I thought I learned that the wake angle is arctan(1/2).  That is different from arcsin(1/3).  Is arctan(1/2) the shallow wake angle? Gah4 (talk) 10:41, 26 March 2020 (UTC)
thread_title:  arctan(1/2) 

message: There is a move discussion in progress on Talk:Wake (disambiguation) which affects this page. Please participate on that page and not in this talk page section. Thank you.  —RMCD bot 09:18, 26 November 2021 (UTC)
thread_title:  Move discussion in progress