Effect of vibration on Heat transfer of fluid in pipe - COMSOL Physics?

We have a one meter long copper pipe through which water passes at a certain speed. The outer wall of the tube is covered by the heater where all the energy of the heater is transferred to the...

21 December 2020 8,954 8 View

SSH is not recognized and other commands are not working as well, what should I do?

Hey guys, There is a strange thing that is going on with my laptop. I receive messages like: ssh is not recognized as an internal or external command but I know I have installed both SSH client...

24 October 2020 2,306 3 View

Electrochemical ratiommetric method?

Can a ratiommetric method be used to determine a non-electroactive substance? If with increasing the concentration of analyte, both the peak current of the ferricyanide ions and the manganese...

16 September 2019 6,629 1 View

Unfolding in negative ion mode in gromacs?

Hi friends! I am running my simulations in negative ion mode, gromacs. The problem is that, my proteins completely unfold, and rotate badly. At the very begininng they start unfolding and...

06 November 2017 1,608 1 View

Experimental measurement error?

Hello everyone, I have been conducted some experimental tests by the time and I have faced some measurement errors. I have 2 pyranometers which form different companies but much similar in terms...

29 December 2016 4,425 9 View

Genetic algorithm benchmark?

20 September 2016 4,461 8 View

Fixing monoclinic angle and then relaxing all other degrees of freedom via VASP?

Hi All, I would like to fix monoclinic angle and then relax all other degrees of freedom using VASP. Could you please help me out? I have tried ISIF=7 which relaxes cell volume but I am looking...

04 September 2016 2,747 2 View

What is the best housekeeping gene in qRT-PCR to compare the expression level of microRNAs in blood samples?

Hi, I am looking for a housekeeping gene to use as a stable endogenous control in qRT-PCR. I found has-miR-1228, RNU44, RNU48, U75 and many more. Is there any difference between them? Thanks

10 September 2014 2,428 13 View

What is the heat of fusion for L-serine and L-thronine amino acids?

I need to know heat of fusion for L-serine and L-thronine amino acids

25 September 2013 5,263 2 View

Does anybody know how to calculate tetrachoric and polychoric correlations?

"In statistics, polychoric correlation is a technique for estimating the correlation between two theorised normally distributed continuous latent variables, from two observed ordinal variables....

09 May 2013 5,334 19 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

Is There Any Feasible Method To Test Fluorescent Compounds Other Than Fluorescence Spectrometers ??

Is There Any Feasible Method To Test The Efficiency Of Fluorescent Compounds Other Than UV Spectrometers ? Suggestions Would Be Appreciated !

02 March 2021 5,785 3 View

How do I determine the degree of polymerization of PEG 400 based on NMR integration?

Hello, I am working on the photocatalytic degradation of PEG 400. I would like to know if it's possible to determine the degree on polymerization based on NMR integration, or by the MW of the...

02 March 2021 6,186 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View