Why does Ethylene glycol produce greater enhancement on heat transfer rate than water its flow in a tube?

01 February 2017 8,540 2 View

Why Ethylene glycol does has produce greater enhancement on heat transfer rate than water its flow in a tube?

Why Ethylene glycol does has produce greater enhancement on heat transfer rate than water its flow in a tube, considering that water has a higher thermal conductivity. What could be the possible...

01 February 2017 7,034 5 View

What is the cause of the drop in thermal conductivity?

I am measuring the thermal conductivity of CuO/EG nanofluids experimentally. At low volume concentration of 1 and 2%, thermal enhancements are very high. At 3 and 4% vol. conc., thermal...

06 July 2016 2,734 6 View

Can these correlations be used in calculating the average nusselt number for cone shaed helical coils?

Can these two correlations be used in computing the average Nusselt number for cone shaped helical coils? The correlations are written in the attached file.

05 June 2016 2,393 0 View

Mesh independent study?

I am carrying out mesh independent study on fluid flow in curved tubes. I am trying to vary the pitch of the curved tube. So, I have various coiled tubes with the same dimensions but with varying...

04 May 2016 855 1 View

I need help in analysing some TEM micrographs?

I need help in analysing some TEM micrographs of imaging of nanoparticles. I have interpreted them but need to see interpretation of some other professional. I would love to have your email to...

04 May 2016 1,528 4 View

Can someone explain how to use FTIR and UV-spectrometer to measure stability of nanofluids?

01 February 2016 6,013 5 View

While sonicating AlN/water nanofluid with a probe type sonicator , the mixture forms a gel. Why is this so? How can it be averted?

Also, in order to ensure stability of the dispersion, to what pH value do I adjust the sample to? Lastly, do I mix the AlN powder with the base liquid before adjusting the pH? or do I mix the acid...

01 February 2016 3,662 1 View

Using importing geometry from autocad or solidworks for ansys simulation, which is better?

I am drawing my model in Autocad 2010 and importing into Ansys. After my simulations, the results I got where incorrect. Does drawing my geometry have something to do with this incorrect result?

11 December 2014 8,854 5 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 View

How to show arrows over the streamlines in CFD-post?

I follow this to make streamlines like the photos attached below: (software- CFD post-processing) First I plot the 2D streamline over a surface "streamline 1". them I plot a vector by the...

01 March 2021 8,668 3 View

How can I make stacked bar graph with scatter plot?

I want to make a stacked bar graph with showing each data value as dots. I tried with graph pad prism, version 6, but could not succeed. Does anyone have tried before making such graphs?

01 March 2021 9,383 1 View

How to increase mesh quality of a cfd model in ansys fluent?

How can one improve mesh skewness, orthogonality, aspect ratio?

28 February 2021 7,730 3 View

What could be reason for getting such type of graph for complex impedance in case of polymer blend films?

Its effect appears in real part of ac conductivity also. Can anyone suggest any reason behind it?

26 February 2021 3,487 3 View

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View