Is it possible to get a negative contribution in ANOVA?

02 March 2015 6,420 3 View

Which is the best way to obtain surface roughness of a microhole?

Can anyone suggest to me the preferred method for obtaining surface roughness of a microhole i.e., should I drill the microhole first and then cut it into 2 pieces OR drill the microhole at the...

08 September 2014 8,549 2 View

Size of a 3D printing part using ABS material

What is the maximum size of a part that could be produced from ABS material using a 3D printer? It is mentioned in the literature that big size ABS parts are prone to warping.

07 August 2014 5,492 7 View

Titanium or Tantalum?

07 August 2014 6,212 8 View

Is there any relation between diameter of electrode and tool wear rate?

In one literature study, it was mentioned that wear increases with increase in diameter.

07 August 2014 8,226 5 View

Can you suggest some good open source softwares for multi-objective optimization?

Which is the best software to do multi-objective optimization? Can you provide details or list of open source softwares?

07 August 2014 2,987 7 View

Is it okay to take SEM pics without cleaning the pieces?

We are microdrilling holes on some alloys. Do we have to clean the pieces or polish it before SEM pics are taken? Is it a correct procedure or will it cause any changes?

07 August 2014 9,727 10 View

Can we use S/N analysis for Full-factorial experiments?

We are planning to conduct full factorial experiments. I found in most of the literature that the analysis associated with Full Factorial experiments is ANOVA based on coefficients. I wan to know...

06 July 2014 1,898 5 View

How are orthogonal arrays and triangular tables prepared?

If you look at any orthogonal array or at a triangular table, there seems to be some logic in how the numbers are shown and allocated. Is there a connection between the two tables?

04 May 2014 4,407 0 View

Is it compulsory to polish a surface after machining?

If we are interested in knowing the effect of machining on workpiece surfaces, polishing would remove most of the burrs and other debris present. We were asked to polish the machined surface...

04 May 2014 1,436 10 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 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 to separate water from glycerol solvent in a solvent recovery vacuum distillation column?

I am currently doing my third year design project. I have been assigned to design a glycerol recovery column in vinyl acetate monomer production. The process unit before the recovery column is an...

01 March 2021 9,525 4 View

What is the state of the drug inside solid lipid nanoparticles (SLNs)?

I am a little confuse with the mechanism of solid lipid nanoparticles (SLNs). The main point of encapsulating drugs into SLNs is because some drugs have low solubility in water. Therefore, SLNs...

01 March 2021 3,703 3 View

Why is the sum of the elements in a row in a Q matrix equal to zero?

When explaining substitution models, the substitutions are expressed as Q matrix. Why is the sum of the elements in a row zero?

28 February 2021 3,864 3 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