Answer / sanjay

REYNOLD NUMBER : It means rate of flow.
Re = p VD/u
Where
Re = Reynolds Number, v = Velocity of flow in m/s, d =
diameter of pipe in m, p = density of fluid in Kg / M³,, u
= Viscosity of fluid.
Turbulent or laminar flow is determined by the
dimensionless Reynolds Number.
The Reynolds number is important in analyzing any type of
flow when there is substantial velocity gradient (i.e.,
shear.) It indicates the relative significance of the
viscous effect compared to the inertia effect. The Reynolds
number is proportional to inertial force divided by viscous
force.
• laminar when Re < 2300
• transient when 2300 < Re < 4000
• turbulent when 4000 < Re

Answer / jothi

In addition to the above,
Laminar flow shows a parabolic flow while a Turbulent flow
shows an irregular flow. This can be seen when you put a
piece of floating material like paper, small wood etc on
the flowing liquid.
But for Transient or the Partial flow, its normally based
on the assumptions, even if we know the Reynolds number,
which includes the type of Liquid, its viscosity, and
impurities too.

Answer / monu

row d v/ myu

where myu is viscosity d = dnsity and v= velocity that
eqation gives reynolds number.......moreover if reynolds
number is high .....fluid is a good one with low
conductivity and low viscosity

What is the difference between mmwc and mmwg?

0 Answers  

---

How would you choose differential range?

0 Answers  

---

what is Automation?

3 Answers  

---

What is the difference between HMI,SCADA and MMI,not abbrevation?

7 Answers   HCL,

---

what is beta ratio?

3 Answers  

---

What are the reliability data ,like failure rate etc,for bently nevada systems & vibration probes.

1 Answers  

---

how to turbine speed measurement?

0 Answers   Jindal Steel and Power,

---

Flame scanner

1 Answers  

---

what is the different between deflection type measurement and null type measurement in RTD?

0 Answers   SHR Solutions,

---

ABB DCS (AC 800 M)redundency take howmany milliseconds to switch from master controller to slave?should be less than DCS scanning time?

2 Answers   SCS,

---

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

0 Answers   ADMA OPCO,

---

Q- Which of the following is Close loop system - a-)respiratory System b-)traffic light system c-)washing machine d-)Room heater my option is A, what is our take on option B & C

4 Answers   Sail,

---