Laminarno i turbulentno strujanje. -Reynoldsov broj
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Laminarno i turbulentno strujanje. -Reynoldsov broj
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Transcript of Laminarno i turbulentno strujanje. -Reynoldsov broj
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Laminarno i turbulentno strujanje. -Reynoldsov broj
![Page 2: Laminarno i turbulentno strujanje. -Reynoldsov broj](https://reader030.fdocument.pub/reader030/viewer/2022012306/589b048e1a28abe6468be5d5/html5/thumbnails/2.jpg)
Stoksov zakon- Otpor sredine
Otpor sredine naziva se sila trenja kojom se neki fluid opire kretanju tela kroz njega.-
viskozna sila
-javlja se kod realnih (viskoznih) fluida
-zavisi od oblika (veličini) tela, vrsti fluida, brzini kretanja tela
p1 > p2
sila – otpor sredstva
-za kuglu radijusa R koja se
kreće u fluidu brzinom v
Ftr =6πηRv
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Kretanje kuglice u cevi ispunjenoj tečnošću