What is the value of re for the smaller channel

Assignment Help Mechanical Engineering
Reference no: EM13704639

The Reynolds number for a particular micro channel flow is found to be Re = 2.

a. If all channel dimensions (length, width, and height) are reduced by a factor of 10, and the time required for a particle to traverse the length of the channel is invariant, what is the value of Re for the smaller channel?

b. If the flow velocity is constant for both channels, rather than the time scale, what is the value of Re for the smaller channel?

Reference no: EM13704639

Questions Cloud

Pump is used to raise the pressure of water : A pump is used to raise the pressure of water from 0 psig to 55 psia. How much power (in kW) will be required to pump 1.5ft3 /s of water? What is the effect of the water temperature on the pump power that is required?
Consider a micro channel with a constant voltage : An important application of micro fluidics is in the area of electro kinetic separations, in which an electric field is applied along the length of a micro channel to generate differential velocities for various components (molecules, nanoparticles, ..
Propose a reasonable synthesis of alcohol : Propose a reasonable mechanism for the reaction - Propose a reasonable synthesis of alcohol and discuss the reaction in terms of the ease of each successive step and sketch the dominant product or products of the overall reaction
Cold cranking amperes of conventional lead-acid automobile : The cold cranking amperes (CCA) of a conventional lead-acid automobile battery is the amount of current the battery can provide at 0°F for 30 seconds and maintain at least 1.2 volts per cell (or 7.2 volts for a standard 12-volt battery).
What is the value of re for the smaller channel : The Reynolds number for a particular micro channel flow is found to be Re = 2. If all channel dimensions (length, width, and height) are reduced by a factor of 10, and the time required for a particle to traverse the length of the channel is invarian..
What is the line in the new coordinate system : A line is represented by two end points (-1,0,0) and (2,0,0). The coordinate system is rotated 90 degrees about the y axis and then the orgin is moved to (2,2,2). What is the line in the new coordinate system? I need help on using this with homogeneo..
Determined the diameter for the steel rod : A machine with a mass of 5000kg will be lifted by a steel rod with an ultimate tensile strength of 860MPa. A factor of safety of 4 must be used. Determined the diameter for the steel rod
Calculate-using the psychometric equations : Calculate, using the psychometric equations presented in class, the humidity ratio, enthalpy, specific volume, and dew point of air at 27.4°C dry-bulb temperature and 43% relative humidity at standard atmospheric pressure (101.325 kPa). Verify your ..
Calculate the overall thermal efficiency of the cycle : Consider an air-standard Otto cycle starting at 9 psia, 77 deg F, with a compression ratio of 11, and a specific heat addition of 200 Btu/lbm. Assume 80% adiabatic compression efficiency and a 75% adiabatic expansion efficiency. Calculate the overall..

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  10 kg of water in a piston cylinder exists as a saturated

10 kg of water in a piston cylinder exists as a saturated mixture at 120 kpa with quality 40. the water is now heated

  Determine the rate of heat loss from the turbine to 3

a real turbine with a mass flow rate of 5.0 kgs of steam has inlet conditions of 6.0 mpa and 700 oc and exit conditions

  Find the shaft id needed to obtain a maximum deflection

Find the shaft ID needed to obtain a maximum deflection at the center of 3 mm if the shaft OD is 22 cm. Assume the shaft to be the same length between supports as the length of the paper roll.

  What is the minimum number of 2m x 3m plates required for

a new cylindrical tank is being designed for seaworld where the 3m high plexiglass wall will be supported using i-beams

  Find solution to second order ode with constant

find the solution to the second order ode with constant coefficients. first solve for the homogeneous solution and then

  For a turbine efficiency of 86 determine a the fraction of

consider a brayton cycle and assume variable specific heats for air. air enters the compressor of a gas-turbine engine

  Draw the projections of a rhombus having diagonals

draw the projections of a rhombus having diagonals 125mm and 50 mm long, the smaller diagonal of which is parallel to both the principal planes, while the other is inclined at 30 to the H.P.

  It is estimated that the isentropic efficiency of the

steam enters a turbine at 300 deg c and exhausts at 20 kpa. it is estimated that the isentropic efficiency of the

  Determine the rate of energy transfer from the air to water

Water enters one stream of an unmixed stream heat exchanger at 20°C and increases in temperature by 10°C. Air enters the second stream on the heat exchanger at 400°C and 5 kg/s. The air temperature at the exit of the heat exchanger is 200°C cooler th..

  Determine the magnitude of the force fa the boy at a must

two boys push on the gate as shown. if the boy at b exerts a force of fb 30 lb determine the magnitude of the force fa

  A single disc clutch with both sides of the disc effective

A single disc clutch with both sides of the disc effective is used to transmit 10 kW power at 900 r.m.p. the axial pressure is limited to 0.085 N/mm^2. If the external diameter of the friction lining is 1.25 times the internal diameter find the requi..

  Determine a the velocity of air through the fan ms b the

a fan with 1-m-diameter blades moves air at 20degc at sea level. the fan produces a volumetric flow rate of 942 m3min.

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd