How can I define homogeneous/ homogeneity of charge air in a petrol engine mathematically?

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How to analysis critical thickness of insulation in Ansys software ?

Can anybody suggest a tutorial file for the above case.

04 May 2016 3,665 2 View

Does iodine value decrease or increase during bio-diesel oxidation?

Iodine value is the degree of unsaturation. If the bio-diesel is oxidized then unsaturations will increase, hence iodine value should increase. I require clarification regarding this.

10 November 2014 8,963 9 View

Why do higher heating values or high calorific values of bio-diesel decrease during accelerated bio-diesel oxidation conditions?

The test was carried for bio-diesel by accelerated oxidation conditions with oxygen and heat at 40°C. We observed an increase in unsaturation in the FAME composition, increase in peroxide value...

09 October 2014 9,208 12 View

How to identify peer-reviewed or referred journals based on indexing, not on impact factor ?

1. whether Journals which are listed in journal citation reports (ISI- Thomson Reuters ,ISI web of knowledge) with Science cited index (SCI), Science cited index expanded for science and...

09 October 2014 8,198 2 View

Can any one provide details on statutory body for scientific misconduct in India?

Scientific misconduct in India for academia. If not available in India, where to file the case.

08 September 2014 9,967 2 View

What are the reasons for being able to capture neither velocities nor post processing velocities, from a shadow graph image?

We recently captured shadow graph image of spray, only diameter was post processed, velocities was not post processed. We used lavision to make a shadowgraph for our experiment. We have captured a...

06 July 2014 6,985 3 View

How do shadowgraphy velocity values and PIV velocity values differ? Which method is better?

Which method is better for spray characterization of velocity- PIV (particle image velocimetry) or shadowgraphy?

04 May 2014 2,546 9 View

What are the properties of glass used for combustion diagnostics application and how to measure the properties of the glass?

Glass used for optical engines

03 April 2014 7,728 3 View

Why does the gasoline port injector's sauter mean diameter (SMD) increase radially when injector is located at a horizontal position?

Gasoline spray diagnostics by malvern instrument for an gasoline port injector.

03 April 2014 1,382 3 View

Why are there differences in SMD variation of gasoline port injector and diesel injector when placed both the injectors vertically?

SMD (sauter mean diameter) for gasoline port injector ( 3-hole injector) increases along the vertical axis at some point and for diesel injector(Conventional injector) SMD value decreases along...

03 April 2014 5,869 1 View

Geotechnical Engineering (Proceedings of the ICE) time review?

Hello everyone, I recently submitted an article to Geotechnical Engineering (Proceedings of the ICE), and the current status has been listed as "EiC Pre-assessment: Ready" for the past 20 days. I...

10 August 2024 6,493 1 View

Why does my protein refolded to beta sheet during thermal denaturation analysis?

Hi! So i attempted to understand a novel protein behavior towards heat application by analyzing its secondary structure change. I subjected the protein to a thermal denaturation analysis using...

06 August 2024 1,989 3 View

Question about combustion Kinetics ?

I am currently working on modeling FCC catalyst regeneration and have come across a point of uncertainty that I hope you can assist me with. In my previous models, I have utilized lumped kinetics...

30 July 2024 6,137 0 View

What should a Mechanical Engineering PhD scholar focus on during their PhD to enhance their chances of securing a postdoctoral position?

29 July 2024 7,714 4 View

May I know the exact Quartile of the journal- Advanced Engineering Materials (Wiley) for material science category?

In some data sources it has been grouped in Q1 and some shows it is Q2.

29 July 2024 4,227 2 View

Ternary in Electrical Engineering?

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28 July 2024 5,771 2 View

What topic or subject does Production Engineering need to address more?

Contemporary scores or innovations in scientific approaches. Hybrid methodologies, emerging themes and cross-cutting issues?

27 July 2024 648 3 View

Expansion thermal of muscle ?

What is the thermal expansion coefficient of human muscle?

27 July 2024 7,190 0 View

Can a shoot-through event of a tri-state digital buffer cause momentary Hi-Z state?

// interested in the difference between floating events and short circuits.

22 July 2024 6,565 0 View

Is there a good macro photography kit for on-site metallurgical investigation?

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Zhihua Chen

For two phase flow, the mixture fraction can be used to define two phases, if it is constant in the computational domain, and the move speeds of two phases (air & fuel) are the same, then, it can be considered as homogeneous.

Jeeva Balu

yes i agree, if sound speed C= constant it is homogeneous and if speed of the sound varies it is non homogeneous. I thank you Zhihua chen for the answer. But i have one question since i am working on experiments with IC engines how could one measure the speed of the sound in the inlet manifold of the engine?