The lift of a wing, Fug, is a function of wingspan, W, chord length, H, surrounding air density, p, and viscosity, µ, and velocity, V. Using p, V, and W as repeating variables, express this relationship in dimensionless form.

The lift of a wing, Fug, is a function of wingspan, W, chord length, H, surrounding air density, p, and viscosity, µ, and velocity, V. Using p, V, and W as repeating variables, express this relationship in dimensionless form.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.13P: 5.13 The torque due to the frictional resistance of the oil film between a rotating shaft and its...

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Q1: The drag force (F) of an aircraft during flight depends upon the length of aircraft L, flow velocity V, air viscosity u, air density p, and bulk modulus of air K. (1) Derive the relationship between the above variables and the drag force by using Buckingham's II- theorem. (2) Explain the physical meaning of the obtained dimensionless groups.
The lift of a wing, Fitift, is a function of wingspan, W, chord length, H, surrounding air density, p, and viscosity, u, and velocity, V. Using p, V, and W as repeating variables, express this relationship in dimensionless form.
b) When a liquid in a beaker is stirred, whirlpool will form and there will be an elevation difference h, between the center of the liquid surface and the rim of the liquid surface. Apply the method of repeating variables to generate a dimensional relationship for elevation difference (h), angular velocity (o) of the whirlpool, fluid density (p), gravitational acceleration (g), and radius (R) of the container. Take o, p and R as the repeating variables.
The conduction heat transfer in an extended surface, known as a fin, yields the following equation for the temperature T, if the temperature distribution is assumed to be one-dimensional in x, where x is the distance from the base of the fin, as shown in figure: To Fin >X T(x) h,T Heat Loss d²T_hp (T-T) = 0 dx² ΚΑ dT dx = 0 Here, p is the perimeter of the fin, being 2R for a cylindrical fin of radius R; A is the cross-sectional area, being R2 for a cylindrical fin; k is the At x = 0: T = T₁ dT At x=L: :0 dx thermal conductivity of the material; T is the ambient fluid temperature; and h in the convective heat transfer coefficient. The boundary conditions are as follows: where L is the length of the fin. Solve this equation to obtain 7(x) by using Euler's method for R=1cm, h= 20 W/m².K, k = 15 W/m-K, L = 25 cm, T₁ = 80°C, and T = 20°C.
01: The drag force (F) of an aircraft during flight depends upon the length of aircraft flow velocity air viscosity density p. and bulk modulus of air K. (1) Derive the relationship between the above variables and the drag force by using Buckingham's II theorem . (2) Explain the physical meaning of the obtained dimensionless groups .
When a liquid in a beaker is stired, whirlpool will form and there will be an elevation difference h, between the center of the liquid surface and the rim of the liquid surface. Apply the method of repeating variables to generate a dimensional relationship for elevation difference (h), angular velocity (@) of the whirlpool, fluid density (p). gravitational acceleration (2), and radius (R) of the container. Take o. pand R as the repeating variables.
The power P required for operating a pump depends on the diameter of the pump D, the pressure rise Ap across the pump, the fluid density p, the fluid viscosity and the Theorem, and D, Q and p as the repeating variables, the dimensionless group associated with μ is given by volume flow rate Q through the pump. Using Buckingham's μDªQbpº. Determine the values of a, b and c. 1. [0.99, 1.01 2. [-1.01, 0.99 3. [-1.01, -0.99 a= b = C=
2- The resistance (R) experienced by a partially submerged body depends upon the velocity (u), length of the body (L), dynamic viscosity (u) and density (p) of the fluid, and gravitational acceleration (g). Obtain a dimensionless expression for (R). Ans. R=(u²L p) f Lg
At a sudden contraction in a pipe the diameter changes from D, to D2. The pressure drop, Ap, which develops across the con- traction is a function of D, and Dz, as well as the velocity, V, in the larger pipe, and the fluid density, p, and viscosity, u. Use D, V, and u as repeating variables to determine a suitable set of dimensionless parameters. Why would ti be incorrect to include the velocity in the smaller pipe a sa nadditional variable?
> | E9 docs.google.com/form تبديل الحساب Questions 7 نقاط Q1/ The power of 6-blade flat blade turbine agitator in a tank is a function of diameter of impeller, number of rotations of the impeller per unit time, viscosity and density of liquid. From a dimensional analysis, obtain a relation between the power and the four variables. 3. صفحة 2 من
Speed is usually a function of density, gravitational acceleration, diameter, height difference, viscosity, and length. Using the repetitive variables method and taking density, gravitational acceleration, and diameter as repetitive variables, find the required dimensionless parameters. V = f(p, g, D, Az, u, L)
The development of a flow situation depends on the velocity V, the density, 3 linear dimensions (L1, L2, L3), pressure drop, gravity, viscosity, surface tension, and bulk modulus of elasticity. In an analysis using the Buckingham Pi-Theorem, how many dimensionless variables can you generate? O a. 6 Pls O b. 5 Pls O c. 7 Pls Od. a Pls