Can an airplane stay up in the the air without moving forward just like helicopter ?

How the lift and weight cancel each other perfectly for a helicopter to stay it motionless? Because its propeller do generate huge amount of lift due to air pressure plus a blend of air stream...

09 February 2021 3,990 14 View

What is the formula used for the calculation of L10?

Is there any formula, which can be used for the calculation of L10 i.e, peak noise level? Please give your opinion?

14 January 2021 8,408 3 View

What is the relation between lattice parameters and particle size in manganites??

The change in particle size is resulting in change in unit cell lattice paramaters in manganites. Please explain it in terms of crystallography and why is it so.

28 February 2018 1,590 3 View

How can i dissolve Sodium Nitrate in organic solvents??

I am to make a solution of Sodium Nitrate and a polymer which is hydrophobic. I have been trying with ethanol, but in vain. Please suggest me a procedure to make a solution of sodium nitrate.

07 November 2017 4,018 5 View

PH of 0.01N HCl ? any reference for this.

It was required for buffer preparation.

27 June 2017 3,684 3 View

Which is the best solvent system for flavonoid isolation in TLC method ?

14 May 2017 3,450 4 View

1000g vcf file mapping against bed file?

Hi all, basically this is a bioinformatics query, I have a 1000genome phase3 vcf file and a clinical bed file, i need to map the bed file against my vcf file to find only CNVs, but not indels, for...

13 October 2016 7,924 2 View

How can I remove chlorophyll from ethyl acetate plant extract ?

13 September 2016 4,655 8 View

Whether sex ratio affects fertility and hatchability in japanese quails? under what mechanism of action sex ratio affects these parameters?

sex ratio, fertility, hatchability, Japanese quails

17 August 2016 149 3 View

How to improve color and odor of polyethylene glycol adipate ?

During drying of polyethyle glycol adipate, odor goes to intense and color becomes dark. Any possible expalanation or solution to this problem.

14 March 2016 4,395 2 View

Is there any tutorial for comsol general projections?

Hi, im trying to make a projection in a 3d comsol model. I have a non uniforme chanel and my intention is to get the average tempreture in the y-z cross section and se the average tempreture...

02 March 2021 4,624 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

Is it possible to do piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch?

How to do Piezoelectric coupling in ANSYS-APDL or COMSOL between tapered substrate and rectangular piezoelectric patch? Piezoelectric coupling between the rectangular substrate and rectangular...

02 March 2021 9,833 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

Issues with Permeabilization during Flow Cytometry?

Hello Everyone. Currently I am working to characterize macrophages in the myocardium after ischemia-reperfusion injury in rats. Due to the low total cell number isolated from rat hearts I can...

01 March 2021 3,867 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 resolve the "final solutuin is not converged" error in Comsol for my heat transfer simulation??

I have been trying to simulate heat transfer problem in Comsol 5.5 for long time but it always throw an error stating: "Failed to find a solution. Maximum number of Newton iterations...

28 February 2021 8,626 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