Which of the following statement is true? The laminar boundary layer is thicker than the turbulent boundary layer   The boundary layer thickness decreases as the distance along the surface increases   Shear stress is greater for the laminar boundary layer compared to the turbulent boundary layer   Laminar flow produces lower skin friction drag compared to turbulent flow

Q: Width velocity of 50 m/s. Determine the drag force acting on upper side of the plate when: Engine…

A: Engine oil at 40°C  L = 20 m  w = 3m   v= 50 m/s  Properties of engine oil at 40°C  ρ = 876 kg/m3, μ…

Q: Describe how Foilsim calculates lift and drag.

A: For students studying about the lift of airfoils and wings, FoilSim II is  very good software. The…

Q: Janie likes to drive with a tennis ball on her car antenna. The ball diameter is D = 2.62 in and its…

A: We need to first determine the velocity of the car and the frontal area of the ball. It will help to…

Q: the transition point between laminar and turbulent flow A. the boundary layer gets thinner and the…

A: Handwriting.jpg

Q: What is used as a similarity parameter to help determine whether the flow in a body and its scaled…

A: to determine dynamic similarity of any system the must condition is that physics of the problem must…

Q: Winglets are used on airplane to A reduce induced drag.

A: Explanation:

Q: the boundary layer

A: given:dynamic viscosity μ =1.79 x 10-5 kg/msvelocity V=37m/slength L=1.6m

Q: falls to earth at terminal velocity. Assume a hail ball (ice) falls into a warm layer of air at 1000…

A: Given: The altitude of warm layer, h = 1000 m The hail temperature, T = -20 C The surrounding…

Q: An aluminum canoe moves horizontally along the surface of a lake at 3.5 mi/h. The temperature of the…

A:

Q: The drag coefficient of a car at the design conditions of 1 atm, 70°F, and 60 mi/h is to be…

A: The drag force on an object can be expressed as,   Given data in SI units is The density of air at…

Q: When testing a new car, the car drives with a constant speed v = 140 km/h. The power of car’s engine…

A: Given data: The constant speed is of the car is v = 140 km/h. The power of car's engine is P = 120…

Q: The boundary layer formed as turbulent around the sphere is when ReD = 2.5*10^5 (a) Golf…

A: Re= 2.5×105Golf ball diameter, Dg= 43 mm= 0.043 mSoccer ball diameter, Ds= 222 mm= 0.222 m   Note:…

Q: Two definitions of displacement thickness are given in this chapter. Write both definitions in your…

A:

Q: When tested in water at 20°C flowing at 2 m/s, an 8-cm-diameter sphere has a measured drag of 5 N.…

A: Write the given data with suitable variables. vw=2 m/sds=8 cm=0.08 mFw=5 Nρw=998 kg/m3μw=0.001…

Q: Calculate the values of the Rx for the two parts of Example 17.1 shown below. Boundary layers on…

A:

Q: discuss various designs of winglets to reduce induced drag.

A: Solution: Given Data and to find: discuss various designs of winglets to reduce induced drag

Q: Calculate the ratio of the drag force on a jet flying at 833 km/h at an altitude of 7.7 km to the…

A:

Q: An aircraft has a total mass of (8.8000x10^1) kg and a wing area of (2.80x10^1) m2. It operated with…

A:

Q: Q/ Prove that the drag force expression for the boundary layer with the velocity profile Sin ) is…

A:

Q: wing and induced drag coefficient!

A:

Q: Estimate the drag force on the fuselage shown below for a cruising speed of 200 m/s at 10,000 m.

A: Given that, Cruising speed of the fuselage, V=200 m/sec,Height of the fuselage, H=10,000 m/sec, The…

Q: A skydiver jumps from (5.5000x10^3) m with no parachute into a giant net. The mass of the skydiver…

A: Given data Mass of skydiver = m = 1.05 x102 kg = 105 kg  Projected Area = A = 0.45 m2 Pressure = P =…

Q: Wind flows over a flat plate of length L = 25 mm and width W = 8 mm. The plate is maintained at a…

A:

Q: Choose false statement about boundary layer 2 po O Boundary layer happens due to zero momentum at…

A:

Q: What is the effect of Reynolds number on drag coefficient , lift coefficient and L/D ratio

A: The lift-to-drag proportion increases as the Reynolds number increases for both the airfoils…

Q: (a) Calculate the frontal area of a parachute of hemi-spherical shape which will allow a parachute…

A:

Q: The car shown in the figure below moves at a constant speed on a highway and has a drag coefficient…

A:

Q: Q) A 6-mm cliameter Sphere is droped into Loaler. The weight of the ball and bouncy force exered on…

A: As per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

Q: Joe recently opened a restaurant and bought a car that has a clean drag area CDA of 3.25 m² and…

A: To find: The fuel money required per year without advertising board and also find the additional…

Q: 1) Show that the Drag equation is homogenous in both SI units and basic units. 1 FD CD Apv²

A: following is the solution to the above problem-

Q: 2. Taking off on a dry cement runway, to minimize the impact of aerodynamics on the acceleration,…

A: Ans: Option(D) 1.7o

Q: How much thrust must the jet's engines provide to cruise at 280 m/s at an altitude where the air…

A:

Q: Calculate for the total drag coeffi given the equation CD = 0.002 + k(0.403) ^2. Given that the Oswa…

A:

Q: The aircraft is designed to carry up to 2800 kg of total mass. The wing area of the aircraft is 30…

A:

Q: 2. You are working for a glider manufacturer and have been asked to analyse the laminar boundary…

A: For the solution refer below images.

Q: ler angles of attack, which is associated wi Diffuser effect Дифузорно течение O a decrease in Lift…

A: Solution ;

Q: 04) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force…

A: A thin layer of a moving gas or liquid in contact with a surface, such as an aeroplane wing or the…

Q: Which of the following boundary conditions is NOT valid for laminar boundary layer flow over a flat…

A: Since all are different questions and as per the guideline, I an solve one question at a time. For…

Q: 04) Define the boundary layer, then find the thickness of boundary layer, shear stress, drag force…

A: Given: The velocity profile, u/U = 4(y/δ)-6(y/δ)^5 The length of plate, L = 1 m The width of plate,…

Q: Question 21 The drag on a moving object, at a fixed speed, is measured to be 24 N. Assuming that the…

A:

Q: Bill gets a job delivering pizzas. The pizza company makes him mount a sign on the roof of his car.…

A: The Work drag  is        W=12ρairAV2CDL where    CD = 0.94 Average speed, V =45 mph…

Q: is the drag coefficient 2 or 0.2?

A: Yes from figure we can see that drag coefficient at 80000 is 0.2 not 2

Fluid Dynamics

The study of the flow of gases and liquids, usually in and around solid surfaces, is known as fluid dynamics in physics and engineering. Fluid dynamics, for example, can be used to evaluate the movement of air through an airplane wing or the surface of a vehicle. It can also be used in ship design to increase the speed at which ships pass through water.