Is there a formula to calculate the surface tension between two fluids provided I know their viscosity and density?

More Paras Ghumare's questions See All

How to derive the expression for the View Factor of a configuration of two bodies, starting from the general case ?

Hi all : Please, I need some help on Heat Radiation Transfer: How I can derive the formula of the View Factor for a particular configuration, in a way of ending with an expression for the VF as...

15 May 2020 4,929 6 View

Radiation Heat Transfer between a Hot body and a real Surface ?

Hi all , How can I consider the Optical properties of a surface into the Stefan-Boltzmann law for a problem of Radiation Heat Transfer between a hot Body and a real Surface (namely, a surface...

15 May 2020 9,449 8 View

Is this a well defined Integral ? If so, does anyone can help me to solve it ?

Dear all : I need to solve the following integral (attached as an image file) The context is on the calculation of View Factors in Radiation Heat Transfer I worked out the this expression from...

15 May 2020 7,500 16 View

How to calculate the Solar Radiative Flux arriving to a Solar Plate Collector placed on the surface of Earth ?

Hi all, I'm trying to perform a calculation on the Flux due only to radiation, received at the surface of a Flat Plate Solar Collector placed on the surface of the Earth. The collector is tilted...

14 May 2020 604 24 View

Air Velocities and Temperature Distributions inside an enclosed air cavity, modeled in COMSOL Multiphysics ?

Dear all : I'm trying to solve the following problem using COMSOL Multyphysics. I have an enclosed geometry (please see the attached images) with a top flat surface (the celing) and an undulated...

19 March 2020 7,455 5 View

Simulation of an Air Solar Plate Collector in COMSOL Multiphysics. Problems with defining the Boundary Conditions ?

Dear all: I need help, I hope there is someone out there who can help me. I finish drawing the 2D geometry of an Air Solar Collector with an undulated absorber plate (in contrast with a flat...

19 March 2020 5,935 9 View

Does the value for the Seebeck Coefficient (S) measured with a Voltmeter can really be taken as the S of the test material ?

Hello to all : This question is originated from the idea that every material (except for Superconductors) has a Seebeck Coefficient (S) different than zero, and from the idea that in every case...

19 March 2020 4,192 5 View

Geophysical response of Water uptake by trree?

When plant takes water from.the soil and the water is transpired by the stomata, is it possible to measure the SP potential...if it is attempted by any one, can you share what kind of electrode...

08 March 2020 6,726 3 View

Diffusion of Carbon atoms in Bismuth Telluride ?

Dear Colleagues : Does anyone have literature referencing the diffusion process of Carbon (I mean Carbon atoms) into Bismuth Telluride (Bi2Te3) or into some other compound alike ? E.g. PbTe,...

05 March 2020 2,976 2 View

Chemical Stability of the System Bi2Te3 with Graphene ?

Hello to all: I'm trying to think in the following interesting problem: I have a system which are polycrystals (grains) of Bi2Te3 (actually this compound is a quaternary alloy of Bi, Te, Se and...

05 March 2020 4,832 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

What is the characteristic length to determine the Reynolds number for the scattered turbulent fluid flow?

Dear all, I just saw this example in FB on the difference between laminar flow and turbulent flow. The flow from a pipe hits the sink and scattered. The flow from the pipe is characterized as...

02 March 2021 1,999 5 View

Can we distinguish the type of free fluid inside the pelvic and abdominal cavities whether blood or serous fluid using the ultrasound?

during ultrasound examination of acute abdomen, sometimes we see free fluid , can we know the type of fluid ,whether blood or not , using ultrasound only? if yes , what are the sonographic...

01 March 2021 7,476 4 View

How much pressure we can reduce at the outlet to avoid Reverse Flow?

I am simulating Heat Exchanger. I have tried and tested all the methods to resolve this issue from the internet like refining mesh, improving skewness and orthogonal quality ,extending outlet to...

01 March 2021 6,985 3 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

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

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

Why do the air flow results vary totally when adding scalar in CFD ?

Dear All, We are using Autodesk cfd to calculate the air flow in a single sided naturally ventilated room, where air flow depends only on buoyancy due to temperature difference between inside and...

25 February 2021 9,602 4 View

Is the a way to contol flow (Flow velocity) without impacting pressure value?

I have a pipe with 10 mm in Diameter and 2 bar pressure, the fluid velocity is 200 m/s, the fluid is air. is there a way to reduce velocity without affecting the pressure value?

25 February 2021 7,187 3 View

Modeling viscosity using model of Chung?

Hello, As part of simulation of gases mixture and water, I need to calculate viscosity of the fluid components and I am using relationships proposed by Chung et al. (1988). The irony is while I...

25 February 2021 8,053 5 View

Paras Ghumare

Alright thanks

Bachir Achour

Please, refer to the following links.

Chapter Measurement of interfacial tension in Fluid-Fluid Systems

http://thermopedia.com/content/30/

Regards

Thomas Frank

Surface tension on the interface between two fluids is a material property like e.g. density.

Luofeng Huang

Yes in OpenFOAM, the details you can keep the thesis of Vuko Vukčević. It is well explained there