Answer
Gingilchaan ispiraalii garagalchuu baay’ee (2-turn ykn 3-turn) $360^{\circ}$ kan qaawwa hin qabne qabachuuf kan kennu yoo ta’u, kunis raabsa fe’umsaa walfakkaataaf gilgaalota garagalcha tokkoo wajjin wal bira qabamee yoo ilaalamu caala. Yeroo baayyee yaa’ii keessatti tapha aksiyoonaa fudhachuuf itti fayyadamu. Fulbaana murtaa'e $T$ filachuudhaan, girgiddaan akka shimii jabaa ta'ee hojjeta. Walgahii obsa eksaayilii olaanaa qaban keessatti, gilgaalota ‘Laminar’ (gingilchaan dachaa walitti tuulaman) fayyadamuun ni danda’ama, haa ta’u malee yeroo baay’ee salphaatti walga’iidhaaf gingilchaan tokko garagalchuu baay’ee filatama. Dizaayiniin garagalcha baay’ee dandeettii seentirifuugiis ni dabala, sababiin isaas garagaltoonni babal’ina raadiyaalii irratti wal deeggaru.
