4. (Problem 2.7) A parallel-plate flow chamber is being designed to study the adhesion of leukocytes to endothelium. The channel width is 2 cm. Determine channel heights that can be used to generate wall shear stresses (i.e., Tyx(y = -h/2) = tw) as high as 20 dyn cm² with flow rates less than 2 cm³ s¹. The viscosity of the tissue culture liquid medium is 0.0087g cm³¹ s¹.

Subject : Thermofluid Question : Air at 20oC flows in a 0.60 m diameter pipe at a rate of 15 m3/s as shown in Figure 3. The pipe diameter changes to 1.2 m through a sudden expansion. i. Assess the pressure rise across this expansion. ii. Explain how there can be a pressure rise across the expansion when there is an energy loss (KL ≠ 0).

7.  a. If the blood viscosity is 2.7x10-3 Pa.s, length of the blood vessel is 0.35 m, tubular resistance of a blood vessel is 38.5 GPa-s/m3 , What is the radius of the blood vessel in mm?b. If the blood pressure at the outlet of the above vessel is 30 mm Hg and the flow rate through the vessel is 100 ml/min, find the inlet pressure in mm Hg. Density of mercury = 13,550 kg/m3, acceleration due to gravity = 9.61 m/s2

8. A large artery in a person's body can be approximated by a tube of diameter 9 mm and length 0.35 m. Also assume that blood has a viscosity of approximately 4 x 10-3 N s/m2, a specific grav- ity of 1.0, and that the pressure at the beginning of the artery is equiv- alent to 120 mm Hg. If the flow were steady (it is not) with V = 0.2 m/s, determine the pressure at the end of the artery if it is ori- ented (a) vertically up (flow up) or (b) horizontal.

In mechanical fluid

long. The inlet water temperature is 10 C, and the tube wall temperature is 15 C water temperature. k 0.585, Pr= 9.4, u= 1.31x10*,p= 992kg/m, CP= 4195 j/kg. higher than the water temperature all along the length of the tube. What is the exit %3D Q5//answer one of the following branches e jall al je yal A) cast iron pipe (k=75w/m. °C) air flows inside this pipe at 300°C the inner diameter is 0.06 m, the outer diameter 7cm,it is covered with insulation type glass wool with thick 4cm. with k= 0.055w/m.°C .the ambient temperature 6 °C by free V3. convection with heat transfer coefficient (20w/m2. °C) the heat transfer inside the pipe is 65 w/m?. °C. length of tube (L-2) determine 1-the heat lost from the hot air 2-the temperature drop across the pipe shell 3-the temperature drop across the insulation. 344 14. 1256 and B) Fill the blanks: of the 1. The thermal resistance of a medium depends on medium. 2 All law. pes of convection are governed by 10000, the flow is

i need the answer quickly

9. The diameter at section (1) is 0.3m. The diameter at section (2) is 0.15m. What is the flow rate of a substance (sp. gr. = 0.85) if the pressure between sections (1) and (2) is 12.7 cm Hg?

K = 1.4*10-4

Determine the pressure drop over a reducer with the following conditions: Fluid density: 25 kg/m3Fluid velocity: 1.5 m/sFluid viscosity: 0.001 Pa*sInlet diameter: 0.12 mOutlet diameter: 0.019 mPipe absolute roughness: 4e-4 m Give your final answer in Pa, rounded to the nearest whole number. [Ignore entrance/exit losses and velocity loss terms]