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P I C H S IGroup 3 :Della Nadya Ayu ApriliaDiah Meiliska AzizDhiastiti Rahma SalsabilaFarlan Sembiring
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VenturImeterVenturimeter is an instrument used tomeasure fluid flow velocity in thepipeline This tool works based on ventury effect
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VenturimeterVenturimeter Venturimeter With Without Manometer Manometer
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Venturimeter With Manometer Venturimeter the manometer is a joint application between venturimeter and pitot tubes. Its function is to measure the rate of fluid.
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From Bernouli’s law equation : So, if the formula subtitued into the first equation,P1 + 1 ρv1² + ρgh1 = P2 + 1 ρv2² + ρgh2 2 2 2 P2+ (ρ’- ρ)gh + : 1 ρv1² = P2 + 1 ρ A1. v1 it become 2 [ ] 2 A2 Because the cylinder is 1 ρ A1. v1 2 1 ρv1² horizontal (ρ’- ρ)gh = 2 [ A2 2 ] so, h1=h2 : 1 1 (ρ’- ρ)gh = 1 ρv1² A ² 1 [ 1 ]P1 + ρv1² = P2 + ρv2² 2 A² 2 2 2 (ρ’- ρ)gh v1² = 1 ρ A² 1P1+ ρgh = Phidrostatic pressureWith Used 2 + ρ’gh 2 [ A² 1 2 ]P1 = P2 get : ρ)gh will + (ρ’- 2(ρ’- ρ)gh v1 = ρ A² 1A1. v1 = A2. v2 v2 = A1. v1 [ A² 1 2 ] From kontinuitas equation it will A2 2(ρ’- ρ)gh be : v1 = A 2 ρ(A ² - A ²) 1 2 The Formula of Venturimeter With Manometer
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Sample of Question Pipes Venturi meter has a cross of each 8 × 10 ¯ ² m² and 5 × 10 ¯ ³ ² is used to measure the speed of the water. If the height difference in the two mercury manometer is 0.2 m and g = 10 m / s ², find the speed of the water (ρ mercury = 13,600 kg / m³, water ρ = 1000 kg / m³).AnswerKnown : A1 = 8 10¯² m², A2 = 5 10¯³ m², h = 0,2 m, and g = 10 m/s². 2(ρ’- ρ)gh v1 = A2 ρ(A ² - A ²) 1 2 = 5 10¯³ 2 (13.600 – 1000) (10) (0.2) 1000 [(8 10¯²)² - (5 10¯³)²] v1 = 0,44 m/s
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Venturimeter Without Manometer Working Principle Venturimeter without manometer is based on the Bernoulli principle, which reads: In the horizontal pipe (horizontal), fluid pressure is greatest at the smallest lag its flow, and pressure is at least part of its flow speed of most.
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From Bernouli’s law equation : Difference P1 and P2 together P11+ P1ρv1²²+ ρgh+ =vP2 +² 1 ρv2² + ρgh2 P – 12 = 1 ρ (v2²1– 11²) 2 + ρv1 = P 2 ρv with the hydrostatic 22 2 2 2 pressureρgh the liquid height h P1 – P2 = of Based on kontinuitas equation : is:A1. v1 = A2. v2 v2 = A1. v1 A2 ρgh = 1 ρv1² ( A1 )² – 1 [ So,its obtained : So that 2 : A2 ] 1P 1 – P2 = 2 [ ρ ( A1. v1 )² – v1² A2 ] v1² = 2gh A² 1 1 A² 2 P1 – P2 = 1 ρv1² ( A1 )² – 1 [ 2 A2 ] v1 = 2gh A 2 [ ] A 1 2 1The Formula of Venturimeter Without Manometers
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Sample of Question Completion : v1 = 2gh 2.10.0,1 v1 = A 2 1 [ ] 1 A 2 3 2 [ ] 1 1 v1 = 2 8 v1 = 1 m/sA venturi meter tool used to measure a 2velocity of water flow in pipes.Apparently the difference between high water Kontinuitas equation :the large cross-section of the large and small A1. v1 pipe 10 cm. if v2 =comparative cross-sectional area A2large and small is 3:1.What is the speed of water flow v2 = 3 x 1the large cross section 1 2and small? v2 = 3 m/s 2
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Uses and Applications Smokestacks Calculating flow rate of fluid in a tube Setting the flow of gasoline in the ignition system of a motor vehicle In the field of medicine, has also designed venturi meter is used to measure the rate of blood flow in the arteries
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Application of Venturimeter1. Mining Installation2. Lab Test Equipment
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Mechanism Work of SmokestacksFirst, the smoke of burning has high temperature heat. Due to hightemperatures,so the density of air is small. If the air wich have aSmall density, it’s easy float moves up. The reasonnot just this, from Bernoullis Principle is also involved in thismatter.Second, Bernoulli’s principle says that if the air flow rate is highthen the pressure becomes low, otherwise if the air flow rate islow, the pressure is high. Remember that the top chimneys areoutdoors. There is a wind blowing at the top of the chimney, so thatthe air pressure surrounding smaller. In the closed room no windblowing, so the air pressure greater. So, the smoke dribbled outthrough the chimney. (air moving from a high-pressure air to a lowair pressure).
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Conclusion Venturimeter is an instrument used to measure fluid flow velocity in the pipeline The formula of venturimeter without manometer are : v = 2gh 1 2 A [ ] 1 A 2 1 The formula of venturimeter with manometer are : v = A 1 2 2(ρ’- ρ)gh ρ(A ² - A ²) 1 2