How to make basis unitary in Natural image statistics?

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Residuals are getting converged, but at a very migh magnitude of values. Why??

I am running a coarse DNS case for pipe flow with 2.1 Million cells. My residuals are quite fluctuating as its a fully turbulent annular pipe flow case but its getting statistically converged to a...

29 May 2024 2,063 5 View

Effect of \nu variation for a turbulent pipe flow at a constat Reynolds number ???

I am trying to run a turbulent pipe flow simulation with turbulent Reynolds number of 600, for 15 seconds, the flow is pressure driven due to gravity enforced buoyancy force which gives kinematic...

20 May 2024 5,619 3 View

Why <u'v'> cross-corelation is important whilte studying Reynolds Stresses in most studies??

In most common turbulence model studies, when considering Reynolds stresses the components of auto-correlation, , , and components of cross-correlation are considered. In the research studies...

02 May 2024 2,776 2 View

Could you please suggest me some of the best multi-parameter water analyzer kits (with brand) that can be taken to field for water quality sampling?

I am planning to work on different water bodies of Andhra Pradesh. So I want to purchase a portable water testing kit with multiple parameters. Please suggest me a few best option, which would be...

17 April 2024 7,210 3 View

Enforcing Wall shear stress (\tau_w) as a boudnary condition in OpenFOAM?

I am working on WMLES (wall Modelled LES) for which if I calculate my wall shear stress analytically and want to enforce it as a boundary condition at the wall patch, so that I do not need to...

15 April 2024 9,059 3 View

Relation between Bulk (Mean) and Friction Reynolds Number??

Is there any specific relation between Re_b (bulk/ Mean Reynolds number) and Re_\tau (friction Reynolds Number). In few of the literature and experimental work I have gone through researchers give...

01 April 2024 861 5 View

Why are the iterations needed to calculate final converged value of Yplus for wallFunctions in OpenFOAM?

This is a code block from nutWallFunction library in OpenFOAM where in, effective kinematic viscosity ($\nut_w$) at the wall is calculated using resolved field(in case of LES)/ mean field(in case...

04 March 2024 9,548 2 View

Effect of Prandtl on velocity for Natural Convection (Rayleigh Benard)?

When Prandtl number is increased for two cases tested over same Rayleigh number, the peak vertical-velocity decreases as Prandtl is increased. This is questionable to the fact that in general...

11 February 2024 4,196 2 View

How to calculate y+ analytically before the simulation if we have fully developed flow for the Annular pipe (a double wall bounded)?

I have a fully developed pipe flow in with Inner radius (r) and outer radius (R), using pressure driven flow condition due to buoyancy, - (1/rho) dP/dx = g and velocity scaling u* = sqrt ( (-R/...

09 February 2024 3,727 3 View

"Conformer generation is disallowed since too many atoms" or "too flexible" in PubChem 3D conformer. Can I perform docking with such compounds?

I wanted to convert few 2D compounds to 3D using Avogadro and then use them for docking. Are these ligands efficient for docking? Will I get accurate results. Thank you in advance.

29 January 2024 9,737 2 View

How to learn more about SPSS and its Application?

I would like to learn more about SPSS and Its application especially in regards to data analysis. Please suggest me how I can learn more about it. Thank you so much.

11 August 2024 9,101 4 View

Is there a problem with my RNA pellet?

Hello, I am currently having problems with RNA extraction. I am using mouse liver (C57BL6J), and I have extracted RNA from mouse liver before. Before this experiment, my final RNA pellets were...

11 August 2024 7,082 3 View

Can I base on reverse DNA sequences to perform alignment, convert to amino acids and GenBank submission?

I have reverse sequences (AB1 format), can I base on reverse DNA sequences to perform nucleotide alignment, convert nucleotides to amino acids and deposit the sequence in GenBank database?

11 August 2024 5,138 1 View

Baseline drift in HPLC? What causes this?

Hello, Why do i see this baseline drift when i compare my blank (black) to the sample (blue)? Any suggestions as to why this happened? Thank you!

11 August 2024 3,770 4 View

Text-Communication from the M1 Hand Area using BCI—and then there is Elon Musk?

Willett, Shenoy et al. (2021) have developed a brain computer interface (BCI) that used neural signal collected from the hand area of the motor cortex (area M1) of a paralyzed patient. The...

10 August 2024 7,180 0 View

Has anyone applied Python in the field of textile engineering for data analysis, automation, or smart textiles?

I'm currently exploring the application of Python in textile engineering, specifically in areas like data analysis, process automation, and the development of smart textiles. I'm interested in...

10 August 2024 7,429 2 View

How can I use the cif data obtained from rietveld refinement extracted via gsas2, for microstructural analysis using ETEX software?

09 August 2024 7,718 0 View

RNA Extraction Using Hot Borate Method No Longer Working?

I've been performing RNA extraction on cotton petiole tissue for a few months now using the method described in the following paper, a derivative of the typical hot borate method...

08 August 2024 9,882 2 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

How to prepare the nanoparticle treated fungal sample for Environmental SEM analysis?

A fungal strain was treated with nanoparticles. We want to do an environmental SEM analysis. So could anyone share your views on preparing the sample? Thank you.

07 August 2024 5,307 1 View