Gas sensor response and recovery time independant of flow rate and chamber volume?

I am trying to obtain the response and recovery times for my gas sensor device. It appears the the response/recovery times are primarily dependant on the flow rate of the gas I inject into the...

26 February 2021 1,511 3 View

Cracked MEMS cantilevers despite wet release and critical point drying?

I have successfully released MEMS cantilevers with a photoresist sacrificial layer, using a dry plasma ashing technique. However, this process tends to damage the metal contact pads and result in...

15 November 2020 8,963 6 View

How to solve two temperature model for ultrashort laser ablation in COMSOL?

24 May 2020 7,273 5 View

Hello Everyone, I am trying to regress a numeric variable on all categorical variables, which method would be the most suitable, ANOVA,Linear Regrsn?

I tried running Linear Regression but I feel the model has heteroskedasticity.

03 May 2020 6,874 6 View

Which method is precise and reproducible to determine concentration of 0.5% w/w Glutaraldehyde; Titrimetry or GC ? Describe the method in brief?

Glutaraldehyde, in low concentration at buffered pH 7.2, is used as a shipping solvent for Medical devices involving animal tissue. Suggest a accurate and reproducible method for determining assay...

12 March 2020 6,032 1 View

When to use bounded Second Order Implicit Time Integration in Fluent?

Fluent offers different temporal discretization schemes. There are two implicit schemes: Second order and bounded second order. I am wondering what are the advantages and disadvantages of these...

12 December 2019 3,795 4 View

How to implement Distributed Activation Energy Model (DAEM) in ANSYS Fluent?

I want to model a chemical reaction in Fluent. However, reaction being too complicated, there is no single activation energy model available. The DAEM approach is used to estimate the products...

26 August 2019 7,144 1 View

How to model a chemical reaction in Fluent involving gaseous reactants and solid product?

I am currently simulating a system involving various chemical reactions. My primary phase is gaseous and secondary phase is solid. There are reactions involving solid to solid and gas to gas...

02 May 2019 3,826 3 View

Can I use k-epsilon turbulence model for transitional flow?

I have a geometry where the flow is transitional. i.e. a part of it has laminar flow and rest part has turbulent flow. Can I use k-epsilon model for this problem? Does it resolve the laminar...

28 March 2019 6,428 19 View

What are the advantages of Finite volume method (FVM) over Finite difference Method (FDM) for particularly flow simulation (CFD) ?

Most of the CFD solvers use FVM. However, FDM is pretty simple to implement. I am interested to know exactly what advantages do FVM offer. And when should one go for FDM if he is planning to write...

13 December 2018 8,641 38 View

What are the most reliable approaches to extract key continuous frames from a video, with complete automation?

I have an input video, of skin (from a microscope that means it is magnified such that blood capillaries are visible). The idea is to extract 15 sec of continuous frames from a video of 1 min,...

02 March 2021 2,735 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

How can extract ciprofloxacin hydrochloride disolve in water er to organic solvent such as dichloromethan or any other solvent?

I need a procedure to extract the ciprofloxacin hydrochloride from aqueous solution by using dichloromethane in detail,. I thank you very much.

01 March 2021 4,306 1 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

Which bacteria are suitable for quorum sensing screening?

I want to find a quorum sensing inhibitor from plant extracts. Klebsiella pneumoniae, Moraxella catarrhalis, Staphylococcus aureus, and Streptococcus pneumoniae. I looked for these strains...

01 March 2021 7,675 3 View

What is recommended for solid domain in ANSYS FLUENT?

Should I mesh the solid domain ? or should I use wall thickness? or Shell conduction? for Heat Transfer between two fluids of a Heat Exchanger. what is recommended?

01 March 2021 9,785 3 View

Can Virtual Servers (remote dekstop manager) run heavy ANSYS Fluent CFD simulation ?

I have a virtual machine. My host Pc specs are not that good thats why i went for virtual servers. so basically my host pc has 8gb of ram with nvidia quadro k2200 4Gb DDR5 GPU ,processor intel...

01 March 2021 8,415 1 View

How to perform statistical analysis of coefficients extracted from transform techniques?

I am studying the potential of DCT and FFT coefficients extracted from a signal to classify the different objects that emit the signal. I applied the Shapiro-Wilk to confirm that data was not...

01 March 2021 8,079 2 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

How to remove fatty material from plant extract?

The resultant solid was partitioned three times with 250 ml of petroleum ether (40-60/c) to remove any fatty material and evaporated to dryness.

28 February 2021 9,464 2 View