Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View

How do I get the values for a intesity / size graph from a zetasizer nano?

I would like to present my zetasizer data as a intesity (percentage)/ size (nm) graph (see example attached) . I however want the raw data so that I can have the curves for various samples on the...

02 December 2020 6,409 2 View

How can I model the laser melting effect on metal surfaces with ANSYS CFD?

Within the scope of my Ph.D. thesis, I want to determine the thermal distribution, melt pool, and melting/solidification processes in the relevant region by melting metal surfaces with a laser...

27 September 2020 5,097 3 View

How to understand if CPU is thorttling back?

Hello everyone, When I have tried to solve quick example on Ansys, iterations took too much time and I think my CPU behaved strangely. The frequency is stable but the CPU %use is waving between...

16 March 2019 7,055 3 View

Can one measure serum retinal without an oxime method?

05 October 2017 6,590 2 View

What are the present works about learning vector quantization (LVQ) methods?

I hope to find some recent works on LVQ a.k.a supervised SOM networks and successful applications.

18 December 2013 5,422 3 View

What are some datasets for indoor outdoor image classification ?

I am looking for a dataset to test my possible solution for being comparative with the former methods. What dataset could be a great candidate?

20 October 2013 2,629 3 View

Which way for large scale problem, kernel approximation with lower dimensional features or using high dimensional features with linear classifiers?

I have a lot of data and classes waiting for classification. I have two different ideas in my mind. Use of kernel approximation or high dim. features with linear classifiers. Is there anyone who...

22 September 2013 211 2 View

What are positive instance selection based Multiple Instance Learning methods?

Suppose there are bags of unlabeled data and I try to learn the positive instances from those bags. I know there are lots of bag based classification algorithms but my region of interest is...

28 August 2013 1,471 1 View

Does the pressure(-600 mmHg) affects pH?

When I conducted the degassing experiment using decompression under anaerobic condition(and I used ferrous based chelating agent), the oxidized ferric were observerd. So, could you tell me the...

03 March 2021 4,892 5 View

Why can't make aluminum nitride film successfully by use sputter?

We use reactive sputtering process to make aluminum nitride film, and want to make c-axis aluminum nitride film on a silicon substrate, but the crystal orientation cannot be seen with...

03 March 2021 7,975 3 View

How two melting peaks in DSC of polypropylene can be merged into one crystallization peak?

The figure shows DSC cooling (blue) and 2nd heating (green) curves (step: 10 K/min) for a commercial sample supplied as Atactic Polypropylene (APP). The heating curve illustrates two major...

03 March 2021 5,857 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

Is there any test to determine the cardiovascular risk of patients with obesity? from the perspective of obesity?

We found tests to determine cardiovascular risk taking into account lipid profile, blood pressure, age, history of diabetes, other laboratories. But when weight is involved, there is a paradox. I...

02 March 2021 6,036 1 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

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

Where can I find life cycle inventory or assessment of non woven materials?

Dear network, I am looking for the LCA or LCI or at least the energy balances of the non woven fabrics process for my master project, in specific for natural fibers, yet I have found...

02 March 2021 9,662 1 View

Sutter electrode holder leaking after applying positive pressure. How to fix?

I am using a Sutter electrode holder for my patch clamp experiments, but I'm having trouble keeping positive pressure inside my electrode due to a leak out of the back of the holder. I have added...

02 March 2021 5,829 1 View

What SPSS analysis should I run with one IV (with two levels) and two DVs?

Hi, I am trying to figure out which test would be most appropriate to run for the following question: Is there a difference in task blood pressure between smokers and non-smokers? There are two...

01 March 2021 8,235 2 View