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Question for the fluid dynamicists here

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  • G glennPattonWork3

    I though you were on Hols...

    N Offline
    N Offline
    Nagy Vilmos
    wrote on last edited by
    #6

    I am. The girls are shopping and I am waiting. In a bar. With wifi. There may, or may not, be a champion's breakfast beside me. :beer:

    G 1 Reply Last reply
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    • N Nagy Vilmos

      I am. The girls are shopping and I am waiting. In a bar. With wifi. There may, or may not, be a champion's breakfast beside me. :beer:

      G Offline
      G Offline
      glennPattonWork3
      wrote on last edited by
      #7

      Lucky *****! :)

      1 Reply Last reply
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      • N Nagy Vilmos

        The base is concaved so it must turn from there.

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        R Offline
        Rob Philpott
        wrote on last edited by
        #8

        Reminds me of a discussion (argument) which may have happened in real life or perhaps even here. Why do Champagne bottles (except Cristal) have concave bases? A. For strength B. For stacking C. To make the bottle appear bigger Genuine question, I can't remember the answer.

        Regards, Rob Philpott.

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        • M Munchies_Matt

          I was snorkelling at the weekend and saw a bottle of beer on the sea bed with the top on, I went down to have a look and sure enough, it did. I let it drop back to the sea bed, vertically, neck up, expecting it to hold that position the entire way, but it didn't, it turned sideways, and fell the entire distance sideways, straight down, without any wobble, or instability. Wow I thought, a bottle of beer, falling through water, has LESS drag falling sideways then length ways? I was surprised. Can anyone suggest a reason why this should be?

          Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

          K Offline
          K Offline
          Keith Barrow
          wrote on last edited by
          #9

          Munchies_Matt wrote:

          Wow I thought, a bottle of beer, falling through water, has LESS drag falling sideways then length ways?

          Yes - as the bottle has a circular cross section - fluid flow round circles is pretty efficient, despite the larger presenented surface area in the direction of travel.

          Alberto Brandolini:

          The amount of energy necessary to refute bullshit is an order of magnitude bigger than to produce it.

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          • R Rob Philpott

            Reminds me of a discussion (argument) which may have happened in real life or perhaps even here. Why do Champagne bottles (except Cristal) have concave bases? A. For strength B. For stacking C. To make the bottle appear bigger Genuine question, I can't remember the answer.

            Regards, Rob Philpott.

            M Offline
            M Offline
            Munchies_Matt
            wrote on last edited by
            #10

            Strength. A concave surface is stronger than a flat one.

            Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

            B 1 Reply Last reply
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            • M Munchies_Matt

              Strength. A concave surface is stronger than a flat one.

              Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

              B Offline
              B Offline
              Bergholt Stuttley Johnson
              wrote on last edited by
              #11

              IIRC it was invented by the British to stop French sparking wine (ie champers) from exploding

              You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

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              • B Bergholt Stuttley Johnson

                IIRC it was invented by the British to stop French sparking wine (ie champers) from exploding

                You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

                M Offline
                M Offline
                Munchies_Matt
                wrote on last edited by
                #12

                Don't know who invented it, but it is for strength reasons.

                Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                B 1 Reply Last reply
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                • M Munchies_Matt

                  Don't know who invented it, but it is for strength reasons.

                  Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                  B Offline
                  B Offline
                  Bergholt Stuttley Johnson
                  wrote on last edited by
                  #13

                  it is, the concave bottom allows the contents to be under higher pressure, the original problem was the wine bottles if disturbed blew the bottom of the bottle off, not a good idea if you export wine

                  You cant outrun the world, but there is no harm in getting a head start Real stupidity beats artificial intelligence every time.

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                  • G glennPattonWork3

                    I though you were on Hols...

                    L Offline
                    L Offline
                    Lost User
                    wrote on last edited by
                    #14

                    someone asked a question with the word 'beer' in it - Nagy receives automatic alerts for any booze-related posts ...

                    PooperPig - Coming Soon

                    G 1 Reply Last reply
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                    • L Lost User

                      someone asked a question with the word 'beer' in it - Nagy receives automatic alerts for any booze-related posts ...

                      PooperPig - Coming Soon

                      G Offline
                      G Offline
                      glennPattonWork3
                      wrote on last edited by
                      #15

                      Ahh, that explains it a sort of :beer:+:bob: alert...

                      L 2 Replies Last reply
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                      • G glennPattonWork3

                        Ahh, that explains it a sort of :beer:+:bob: alert...

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #16

                        While sometimes a little out-of-this-world, or off-the-planet, I wouldn't describe the nodge as an alien...

                        PooperPig - Coming Soon

                        1 Reply Last reply
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                        • G glennPattonWork3

                          Ahh, that explains it a sort of :beer:+:bob: alert...

                          L Offline
                          L Offline
                          Lost User
                          wrote on last edited by
                          #17

                          Oh! Sorry - sor the email and not the post - I see you did a bob - I thought you wrote the word alien - if you see what I mean!

                          PooperPig - Coming Soon

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                          • L Lost User

                            Oh! Sorry - sor the email and not the post - I see you did a bob - I thought you wrote the word alien - if you see what I mean!

                            PooperPig - Coming Soon

                            G Offline
                            G Offline
                            glennPattonWork3
                            wrote on last edited by
                            #18

                            No worries!:cool:

                            1 Reply Last reply
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                            • M Munchies_Matt

                              I was snorkelling at the weekend and saw a bottle of beer on the sea bed with the top on, I went down to have a look and sure enough, it did. I let it drop back to the sea bed, vertically, neck up, expecting it to hold that position the entire way, but it didn't, it turned sideways, and fell the entire distance sideways, straight down, without any wobble, or instability. Wow I thought, a bottle of beer, falling through water, has LESS drag falling sideways then length ways? I was surprised. Can anyone suggest a reason why this should be?

                              Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                              C Offline
                              C Offline
                              cptKoala
                              wrote on last edited by
                              #19

                              What I can't figure out and what suprises me is the fact you left the bottle of beer behind :doh:

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                              • C cptKoala

                                What I can't figure out and what suprises me is the fact you left the bottle of beer behind :doh:

                                M Offline
                                M Offline
                                Munchies_Matt
                                wrote on last edited by
                                #20

                                It was a good few months old IMO. I didn't think it would be that drinkable. :)

                                Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                                P J 2 Replies Last reply
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                                • M Munchies_Matt

                                  I was snorkelling at the weekend and saw a bottle of beer on the sea bed with the top on, I went down to have a look and sure enough, it did. I let it drop back to the sea bed, vertically, neck up, expecting it to hold that position the entire way, but it didn't, it turned sideways, and fell the entire distance sideways, straight down, without any wobble, or instability. Wow I thought, a bottle of beer, falling through water, has LESS drag falling sideways then length ways? I was surprised. Can anyone suggest a reason why this should be?

                                  Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                                  K Offline
                                  K Offline
                                  kmoorevs
                                  wrote on last edited by
                                  #21

                                  Wow, excellent observation, question and answers! :thumbsup:

                                  "Go forth into the source" - Neal Morse

                                  1 Reply Last reply
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                                  • M Munchies_Matt

                                    It was a good few months old IMO. I didn't think it would be that drinkable. :)

                                    Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                                    P Offline
                                    P Offline
                                    PIEBALDconsult
                                    wrote on last edited by
                                    #22

                                    To misquote George Banks: "... rendering the beer undrinkable, even by Americans."

                                    You'll never get very far if all you do is follow instructions.

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                                    • M Munchies_Matt

                                      It was a good few months old IMO. I didn't think it would be that drinkable. :)

                                      Sign a petition calling for the boycott of Israel until it returns to its legal 1967 borders.

                                      J Offline
                                      J Offline
                                      Joe Woodbury
                                      wrote on last edited by
                                      #23

                                      You could have Nagy do a taste test.

                                      1 Reply Last reply
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                                      • R Rob Philpott

                                        Reminds me of a discussion (argument) which may have happened in real life or perhaps even here. Why do Champagne bottles (except Cristal) have concave bases? A. For strength B. For stacking C. To make the bottle appear bigger Genuine question, I can't remember the answer.

                                        Regards, Rob Philpott.

                                        P Offline
                                        P Offline
                                        PapaCraft
                                        wrote on last edited by
                                        #24

                                        not at all, only to put the thumb in its ass for serving it... "A flute of champagne must be filled with elegance! As well as the opening of the bottle, Champagne service has its ritual which contributes to the pleasure of the guests. To be paid, the Champagne bottle can be held in the Middle full hand (as is done for other wines). It is also very convenient, especially for the magnums, grasp the bottom of the bottle, right hand thumb introduced in flare and other fingers stretched under the base of the Bole, the other hand gently supporting the neck." Exactly what I say shortly! :-\ http://www.maisons-champagne.com/encyclopedie/vignes_au_plaisir/servir_champagne.htm[^]

                                        entia non sunt multiplicanda praeter necessitatem

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                                        • P PapaCraft

                                          not at all, only to put the thumb in its ass for serving it... "A flute of champagne must be filled with elegance! As well as the opening of the bottle, Champagne service has its ritual which contributes to the pleasure of the guests. To be paid, the Champagne bottle can be held in the Middle full hand (as is done for other wines). It is also very convenient, especially for the magnums, grasp the bottom of the bottle, right hand thumb introduced in flare and other fingers stretched under the base of the Bole, the other hand gently supporting the neck." Exactly what I say shortly! :-\ http://www.maisons-champagne.com/encyclopedie/vignes_au_plaisir/servir_champagne.htm[^]

                                          entia non sunt multiplicanda praeter necessitatem

                                          R Offline
                                          R Offline
                                          Rob Philpott
                                          wrote on last edited by
                                          #25

                                          Very nice!

                                          Regards, Rob Philpott.

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