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Pratical Lecture 3 Mecânica de Fluidos Ambiental 2015/2016

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Pratical Lecture 3Mecnica de Fluidos Ambiental 2015/2016Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

A figura representa um reservatrio pressurizado, com fluidos em repouso (Mercrio com massa volmica de 13.6 *103kg/m3 e gua com 103kg/m3). Na parte superior do reservatrio encontra-se ar presso absoluta de 180kPa. Quando o manmetro A indica uma presso absoluta de 350kPa, quanto vale h? (1 val)Nessas condies quanto vale a presso relativa indicada pelo manmetro B? (considere a presso atmosfrica igual a 1 bar) (1 val)Quanto vale a fora exercida sobre a placa que separa o mercrio da gua? (2 val)Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

BAMecnica de Fluidos Ambiental 2015/2016

BA

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

Xcp= distance of the pressure center to the beginning of the inclined surface. Ycp is the distance to the gravity center.

Mecnica de Fluidos Ambiental 2015/2016

The momentum of P must balance the momentum of the hydrostatic force.CGThe hydrostatic force is applied on the Center of Pressure.CPYCPMecnica de Fluidos Ambiental 2015/2016

The momentum of P must balance the momentum of the hydrostatic force.CGThe hydrostatic force is applied on the Center of Pressure.CPYCP

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

FhFvhBCFh opens the gate and Fv closes it. The movement of the gate will depend on the momentum.Neglecting gate thickness:

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

FvFhP1P2The total momentum referred to point O is zero.We have 4 Forces: 2 hydrostatic and 2 weights.

Mecnica de Fluidos Ambiental 2015/2016

FvFhP1P2Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

Tableshttps://ecourses.ou.edu/cgi-bin/ebook.cgi?doc=&topic=fl&chap_sec=&page=&appendix=sections

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

Mecnica de Fluidos Ambiental 2015/2016

Spar buoy- bia de mastro, uma vara flutuante com um pes na extremidade de forma a uma parte da vara flutuar 2 in = 50mm18 in = 450mmNewtons de ao

Mecnica de Fluidos Ambiental 2015/2016

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