Hedieh Fallahi

10 Questions 18 Answers 0 Followers

Questions related from Hedieh Fallahi

How to simulate mixing in microfluidics in COMSOL ?

I am trying to simulate the mixing of 2 fluids in a microchannel. The velocity plots seems ok , but for the concentration graphs, it seems that mixing occurs in the inlet region and when i change...

09 May 2021 5,141 3 View

How to apply strain to a 3D in one direction in COMSOL?

I have a 3D block of an elastic material. I stretch it from one surface in one direction and for example I stretch it for 5 mm in Y direction. so my input load is either external stretch or...

06 April 2020 1,099 4 View

What does blue shifting(shifting to higher wavebumbers or lower wavelength) show in ATR analysis?

The COC peaks of my PLA nanocomposite has shifted to higherwave numbers ( around 20 cm-1) in comparison with the neat PLA nanocomposite. What does this shift mean and what kind of interaction does...

24 February 2017 6,331 3 View

Observing a melting peak in the 1st heating curve of a PLA sample in DSC, while the crystallinity is calculated almost zero ?

What is the reason of observing a big melting peak in the first heating curve of a PLA sample in DSC, while the crystallinity is calculated almost zero according to the second heating graph ? I...

26 January 2017 1,624 8 View

How to calculate the crystallinity percentage of PLA from the DSC results while we have cold crystalization peak?

I have provided a DSC graph of my PLA in the attachments , the green line shows the second heating graph. In different articles the crystalinity percentage of a polymer is calculated by the...

23 January 2017 9,640 11 View

How can I calculate the yield of a chemical reaction?

AgNWs have been synthesized from AgNO3. The product mainly contains nanowires and a small amount of nanoparticles. I want to calculate the yield of this reaction. In other words whats the...

02 December 2016 324 4 View

What are the drawbacks of chitosan thin films?

Can anyone introduce me papers about the disadvantages or the drawbacks of chitosan thin films? Thank you in advance

16 September 2016 9,524 1 View

Does polymer crystallinity improve the electrical conductivityof it?

In insulating polymers with low or high degree of crystallinity, if a conductive nanoparticle is added,will the electrical conductivity of the composite depend on the degree of crystallinity of...

25 August 2016 1,888 10 View

Why do the IR(ATR technique) bands of my composite shift to left(higher wavnumbers)?

The distinctive IR(ATR technique) bands of my composite have shifted to left (about 2-3wavenumbers) in comparison to the IR bands of the pure material.However, a couple of the bands shifted to...

14 August 2016 537 4 View

What is the highest FoM reported by now for indium tin oxide?

Indium tin oxide coated on glass or PET substrate has a sheet resistivity and transmittance which is quantified by Figure of merit(FoM)= T10/Rs .I want to know the highest (best) FoM reported so...

26 June 2016 5,799 0 View