Microfluidics Definition and 16 Threads

Basically, I want to determine how many microchannels I can have in parallel to drive a fluid (for now assume water),without the syringe pump stalling. Let's say a syringe pump have a maximum linear force of 50 lbf. and I want to drive the fluid at 60 ml/hr. So if I have 4 parallel channels...

Hi All, I need some help to figure out how to best go about setting-up and analyzing a micro-fluidics design problem I ran across in my research. It's not the typical single-surface contact angle adhesion kind of analysis. Basically, I have a wide micro-fluidic channel that's formed by a...

I have been simulating a 2D particle/droplet motion inside a larger emulsion using Comsol where the flow field inside the emulsion is calculated from a moving mesh laminar flow simulation. my problem is: I always get an undefined variable error " Variable: comp1.w" however this variable is the...

Hi everyone I am trying to build an experiment with microfluidics. I have a reservoir containing a bellow. This bellow is a compensation mechanism and makes sure that the liquid (in this case water) can be pushed out of the reservoir. Before storing the fluid in the reservoir, the reservoir is...

For an experiment I am running, I am trying to generate 80% foam quality in a 100 x 50 micron^2 channel. My question is, how can I achieve 80% quality dynamic foam ? I came across many papers that use Injection pressure ratio between gas and water. Other papers use flow rate ratios. I am a bit...

a microchannel of length 2L and width h in the thermal cycling region. the temperature profile ...(1) the cyclic temperature profile leads to a time dependent density ...(2) using the mass conservation equation i.e. ...(3) and momentum balance equation i.e. ...(4) we have to find the exact...

Hi All! Haven't been here for some time, the changes are looking good! Anyway, formalities aside, I am having serious problems sourcing and implementing a suitable stainless steel (Grade: 304; thickness: 0.3mm) substrate for my etching process. I'm currently working on developing a...

I need to measure the density of aqueous microdroplets in oil. My first idea was to obtain a set volume of the droplet-in-oil mixture and weigh it to obtain the density, weigh the same volume of oil without droplets, then estimate the volume of the droplets so I can work out their density...

What are the career opportunities one can have except for research in academia after a PhD in Mircofluidics?

The diffusion distance for a Brownian particle is given as x^2 = 2Dt D: diffusion coeficient, t: time However, not all textbooks include the factor 2 (i.e. they just write x^2=DT). Is there a difference or are they just beeing sloppy? I run into trouble when I want to calculate the length of a...

Me and my friends have been trying (b) for soooo long! we have gone to PhD students and some fluid dynamic doctors for held and they cannot figure this out. 1. Homework Statement 2) This question concerns the design of a ‘micro-chemostat’ device. E. coli exhibiting chemotaxis can swim up to...

I have been looking on the web but I can't seem to find a textbook answer that describes the difference between microfluidic t-junctions that are symmetric and those that are asymmetric. From some papers I've gathered that you can make t-junctions asymmetric by changing the hydraulic resistance...

Hello everybody, What kind of job (career) that someone with PhD in Physics (Microfluidics) can handle? I am interested in that field and i would like to know what kind of jobs i can do after i finish my PhD (Apart from post-doc). Thank you

Hi! I want to characterize microfluidic device with nanochannels and i choosed to use current monitoring. The nanochannel is basically linking to resevoirs (microchannels with electrodes. At one electrodes I have the voltage and on the outlet of my chip I put a resistance. By mesuring the...

Hi everybody! first of all congratulations for the forum, you have very interesting things here! This is the first time that I write a question, and I would be soooo pleased if anyone could help me. I am working with COMSOL multiphysics program, and I am trying to simulate the flux inside a...

Does anybody know what microfluiditics is? I need to research it for an assignment. Help needed