Mechanical Engineering

Members

13

• Rank
Member

2. ## cengel thermodynamics(PROPERTY DIAGRAMS FOR PHASE-CHANGE PROCESSES)

could you please tell me what is "high pressure" domain? i read several books, but i found nothing. i'm gathering formulas about how to calculate properties of fluids (like k, cp or mu), they just say this formula is used for high/low pressure
3. ## How many pressure do we have?

hello, how many pressure do we have and what are the differences? what are mechanical pressure, thermodynamics pressure, static pressure, dynamic pressure , hydrodynamic pressure, absolute pressure, etc...? which pressure do we put in eq of motion (NS) ?
4. ## dimensionless temperature

no one knows?
5. ## dimensionless temperature

hello why dimensionless temperature in heat transfer is: theta= (T-Tinf)/(Ts-Tinf)? why it is not (T/Tinf) like dimensionless velocity which is u/Uinf ?
6. ## properties of supercritical fluids

thank you🙏 so what are EOS for near critical region?where can i find them?

thank you🙏
9. ## time averaged equation

why we called (uv) Reynolds stresses ?
10. ## time averaged equation

hi. i want the derivation of these equations. where can i find it?
11. ## cengel thermodynamics(PROPERTY DIAGRAMS FOR PHASE-CHANGE PROCESSES)

what does this paragraph mean in cengel thermodynamics (it is on page 119): Above the critical state, there is no line that separates the compressed liquid region and the superheated vapor region. However, it is customary to refer to the substance as superheated vapor at temperatures above the critical temperature and as compressed liquid at temperatures below the critical temperature. where is this region " it is customary to refer to the substance as superheated vapor at temperatures above the critical temperature "? i attached a pic. i don't know whether i understan it or not
12. ## properties of supercritical fluids

Hello, I need some information about super critical fluids properties. How to determine, what are related equation, etc. If you know any book or article, please tell me
13. ## Energy obtained from a Steam Power

hello, i have a question. why turbines works with hot steam?why don't we use cold air? is it related to second low of thermodynamics?
×
×
• Create New...