SAW mass sensor, What is the physical explanation for frequency shift from mass loading effect?

08 September 2016 5,101 3 View

How can I find exact frequency that my particle in PDMS will lineup ?

Dear All, I have SAW device(Al electrode on LinNbO3) and it was measured by impedance analyzer, Stripwidth= 50 um, resonance frequency = 20.02 MHz. After that I bond PDMS(channel width 100um) on...

01 February 2016 7,083 2 View

How can I do PIV (Particle image velocimetry) ?

Dear All, I have VDO of particle movement in microchannel, but I have no idea how can I start to do PIV ? Should I start by using Matlab...

09 October 2015 7,030 5 View

Should it be an exact SAW wavelength to actuate exact particle diameter?

09 October 2015 854 3 View

How can I find the particle accumulation rate from experiment?

Dear All, I have photos of particle accumulation in the bottom of the container. How can I find the accumulation rate ? I know PIV that can measure the velocity of the particle in the flow, but I...

09 October 2015 9,501 3 View

Is there any guideline to design the IDT pattern for SAW?

Dear All, I have read some of the IDT design pattern, normal pattern are finger and void with same distance, but there are also the pattern that the distance between finger is less than the finger...

08 September 2015 1,930 0 View

How can I couple Acoustic Radiation to Laminar flow in COMSOL?

07 August 2015 1,364 2 View

Is there anyway to control number of cells in droplet?

06 July 2015 3,890 4 View

Why am i getting error in compile UDF DPM tutorial?

Dear All, I am trying to compile the example 2 in http://www.arc.vt.edu/ansys_help/flu...ne_dpm_bc.html but I have found common problem that I have found many times "error C2065: ___________ :...

04 May 2015 1,184 0 View

How can I use workbench with UDF Fluent?

Dear All,I need to use Workbench for FSI, and I have to use UDF in Fluent.Normally, I did 1) open SDK 2)Go to working directory 3)open Fluent 4) open Case 5) Load UDF Then, how can I open...

03 April 2015 9,591 2 View

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 3 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

Discrete Phase model (DPM) particle break-up has particle size limits during particle tracking?

Hello, I am currently working on simulating water droplet partciles in a closed room. When I use uniform particles, without "particle break-up", I can carry out the simulation without any problem....

02 March 2021 3,053 2 View

Could anyone tell me what is the range of submillimeter wave?

There is confusion regarding the submillimeter-wave range. Many papers specify its range from 300GHz but some also consider its range from 100GHz. If I design an antenna on 122ghz what would I...

01 March 2021 516 7 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

What is the density for pva electrospining?

I'm Juan Carlos, a high school student who is working with electropinning, I made an electropinning machine with a 21g needle and a 30kv high voltage source and the distance between my needle is...

28 February 2021 298 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

Complex wave form in ANSYS?

Is there a way to input wave speed in a complex form on ANSYS? The wave speed I need to assign a material is 325(1+0.11i) however I have been unable to do this thus far. Failing that, is there...

27 February 2021 5,969 1 View

Should we reduce the standard unit of length to 0.31951540592 meter ?

The reasoning behind this question is to align the ratios of the proton potential in energy per charge to the speed of light in distance per time. As these two dimensions appear to be related,...

27 February 2021 947 7 View