Recent content by rr00053

If the transparency is dependent on the chemical structure then can u explain why PMMA is transparent while polyethylene (which is also a hydrocarbon polymer) is opaque? is there any other reason other than the electron-photon interaction. I mean can anyone give a better explanation.

Dear David, The following paper and presentation has helped me a lot...I thankyou very much fr the data you had given me..

Hi tiny tim, Thanks...but i need the relative permitivity of nickel as well which is not available in wiki... do u have any other source?

Hi, can anyone tell me the relative permittivity of Nickel and Silicon dioxide... this is urgent ...pls someone help me...

Hi Davidleee... thanku very much for the data...it helped me to get some useful information about the input and output conditions...i am looking out for the boundary conditions as well...anyway thanks for providing me this key data...it helped me to get started... thankyou

COMSOL help- very URGENT Hi there... Can anyone help me to model the wave propagation through a block of material using the 3D electromagnetics application mode in comsol? I want to simulate the attunation in the intensity of wave when it travels through different materials like Si, Ni...

Hi timepasser, I am getting back to you for the old problem which u did? I now have the 3D electromagnetics module... so can you help me how you tackled to study the propagation of wave through the metal strip...that would be very helpful to me... Please do reply.. Thanks

Hi andy resnik, thankyou very much for the links and references..

Hi everyone... I am doing a problem on heat transfer on multilayers... want to find out the emmisivity of some materials like silicon, silicon dioxide, Nickel, Tungten... Can anyone suggest me some papers or links or good books to get the emmisivty of these materials... Thanks in advance

thanks minger.. so u mean to say that i can't rely on the formula which u gave nw...ok then my hard time starts nw to find on the nano scale...can you tell me what those above equations will be if my crss section is a cuboid? and lso any source to find reynolds and prandlt's parametre?

hi minger thanks for responding...so how will i get those values? is heat transfer coeffecient a geometry based function? i am actually interested in microns and nanometre scale values...

Hi everyone... I am doing a heat transfer simulation problem related with silicon, silicon dioxide and Nickel... I would like to get some parametres like heat transfer coeffecient(h), emmisivity (e) etc of these materials ...has anyone got this data or can anyone suggest me a link to get...

Hi everyone, I am doing a simulation using COMSOL 3.3a... I am using heat transfer module. I have 3 subdomains in my design with sizes in range mm, micrometre and nanometer...the third nanometre block appears just as a line...bt however i was able to give all boundary and subdomain details as i...

HI andy resnick, thanku for the valuable links...

Hi matlabdude, thanku very much for the response and the reference u gave...taking a quick look at the data u gave and the data andy resnick gave...the maximum transmission seems jus below 60%. however u pointed out tat transmission is at high 90's ... anyway thanyou for the data you gave...