What publications on classical mesoscopic systems can be found?

The theory of mesoscopical systems can be divided into two parts: theory of mesoscopic quantum systems and the classical theory of mesoscopic systems. In a quantum mesoscopic considered electronic...

11 December 2015 2,924 3 View

Why in derivation of the equations of continuum mechanics the model of material point is used?

Model material points cannot be used for describing the motion of macroscopic bodies. The derivation of the equations of continuum mechanics based on the use of limit theorems, in which the size...

09 October 2014 8,132 18 View

What kind of electrons, free electrons or bounded electrons, occupy energy level in zone theory of quantum mechanics?

In the quantum theory of electrical conductivity are considered free and bound electrons. Lev

09 October 2014 3,612 11 View

Why? Why you are basing on the model of a material point?

08 September 2014 6,705 1 View

Why in Navier-Stokes equation and usually used equations there is no diffusion velocity?

07 August 2014 262 14 View

Can you use equations of motion not for material points but for equations of mesoscopic particles?

In mesocsopical systems, interactions described with action fluxes in a mechanical system are flow of impulse. (See attachments.) Lev

07 August 2014 9,160 3 View

Are there diffusion terms in an equation of CONTINUUM?

In no uniform fluids there is diffusion flow.

07 August 2014 1,969 2 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

In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein?

Hi In Molecular Dynamics Simulation, how do I make changes to the force field according to my protein? I got this error in the add-ion stage: Fatal error "./ amber99sb-ildn-HHH.ff / force...

01 March 2021 8,747 4 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 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

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 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

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View