Dab tsi yog lub zog rub ntawm lub davhlau ya nyob twg?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Nws tshwm sim thaum lub sum ntawm cov rub zog (F_d) thiab lub buoyancy yog sib npaug rau downward zog ntawm lub ntiajteb txawj nqus (F_G) ua yeeb yam ntawm qhov khoom. Influid dynamics, ib yam khoom yog txav ntawm nws terminal ceev yog hais tias nws ceev yog tas mus li vim lub restraining zog exerted los ntawm cov kua uas nws txav mus.

Kuj kom paub yog, koj ua li cas thiaj nrhiav tau lub davhlau ya nyob twg nrog lub zog rub?

Siv lub tshuab ntsuas qhov nrawm, v = lub hauv paus square ntawm ((2 * m * g) / (ρ * A * C))

1. m = loj ntawm cov khoom poob.
2. g = qhov acceleration vim lub ntiajteb txawj nqus.
3. ρ = qhov ntom ntawm cov kua qhov khoom yog ntog dhau.
4. A = qhov projected cheeb tsam ntawm cov khoom.
5. C = cov coefficient.

Tsis tas li ntawd, qhov dav dav dav dav ntawm lub pob yog dab tsi? Vim terminal ceev nyob ntawm luag thiab anobject's cross section, tsis muaj leej twg ceev rau terminal ceev . Feem ntau, ib tug neeg poob saum huab cua ntawm lub ntiaj teb mus txog terminal ceev tom qab li 12 vib nas this, uas npog txog 450 meters lossis 1500 ko taw.

Tsis tas li ntawd, qhov kev sib raug zoo ntawm kev quab yuam thiab kev tshaj tawm yog dab tsi?

Luag quab yuam yog proportional rau tus nrawm rau laminar ntws thiab squared nrawm rau turbulent flow. Txawm tias qhov kawg ua rau ntawm ib luag yog viscous txhuam, turbulent luag nyob ywj pheej ntawm viscosity. Luag quab yuam ib txwm txo cov kua dej nrawm kwv tij rau cov khoom khoom nyob rau hauv cov dej txoj kev.

Ib qho piv txwv ntawm kev quab yuam yog dab tsi?

Huab cua kuj yog ib qho piv txwv ntawm luag , yog zog uas cov khoom xav tias thaum lawv txav los ntawm cov kua (kua lossis roj). Zoo ib yam li kinetic kev sib txhuam, rub zog yog reactive vim hais tias nws tsuas yog tshwm sim thaum theobject yog txav thiab nws taw qhia nyob rau hauv lub opposite kev taw qhia rau theobject qhov kev txav los ntawm cov kua.