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TL2101 Mekanika Fluida I

Benno Rahardyan

Pertemuan 4

Mg Topik Sub Topik Tujuan Instruksional (TIK)

Pengantar Definisi dan sifat-sifat fluida,

berbagai jenis fluida yang

berhubungan dengan bidang TL

Memahami berbagai

kegunaan mekflu

dalam bidang TL

Pengaruh tekanan Tekanan dalam fluida, tekanan

hidrostatik

Mengerti prinsip-2

tekanan statitka

Pengenalan jenis

aliran fluida

Aliran laminar dan turbulen,

pengembangan persamaan

untuk penentuan jenis aliran:

bilangan reynolds, freud, dll

Mengerti, dapat

menghitung dan

menggunakan prinsip

dasar aliran staedy state

Idem Idem Idem

Prinsip kekekalan

energi dalam

aliran

Prinsip kontinuitas aliran,

komponen energi dalam aliran

fluida, penerapan persamaan

Bernoulli dalam perpipaan

Mengerti, dapat

menggunakan dan

menghitung sistem prinsi

hukum kontinuitas

Idem Idem + gaya pada bidang terendam Idem

Aplikasi kekekalan

energi

Aplikasi kekekalan energi dalam

aplikasi di bidang TL

Latihan menggunakan

prinsip kekekalan

eneri khususnya dalam

bidang air minum

UTS - -

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Bernoulli equation

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(i) Water flows in a circular pipe which increases in diameter from 400mm at point A to 500mm at point B. Then pipe then splits into two branches of diameters 0.3m and 0.2m discharging at C and D respectively. If the velocity at A is 1.0m/s and at D is 0.8m/s, what are the discharges at C and D and the velocities at B and C?

(ii) If point A is 5m higher than point B and the pressure at A is 15kN/m2, what is the pressure at point B?

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A pipe which is carrying water turns through 45o in the horizontal plane, at the same time it reduces diameter from 0.55m at the entrance to the bend to 0.25m at the exit. The water is measured as flowing at the rate of 400 litres/s with a pressure at the entrance of 1.5 bar.

Neglecting any head loss due to friction,

calculate the force exerted by the water on the bend, andits direction of application.

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