Dear Hanieh,

By default, temperature is shown in Kelvin. Using Definitions>variables you can define a new expression as T1= T-273.15 which shows you the temperature in celsius.

Also you can type [degC] next to the parameter you want to define in ºC.

Dear Hanieh,

By default, temperature is shown in Kelvin. Using Definitions>variables you can define a new expression as T1= T-273.15 which shows you the temperature in celsius.

Also you can type [degC] next to the parameter you want to define in ºC.

Dear Hanieh Azizi

your problem is using ".". just define like this: 52[W/(m*degC)]

Dear Zahra,

I want to convert strain in dB from ppm( parts per million ). How to do that?

thanks alot

Zahra Hajati

Amir Reza Ansari Dezfoli

Sorokhaibam Nilakanta Meitei

Are you talking about mechanical strain, which is defined as " change in length / original length"? Strain is a dimensionless unit since it is the ratio of two lengths.

Dear Hanieh Azizi

i do agree with Zahra Hajati

you can type "degC" to convert kelvin to celsius.

Thank you very much Madam Zahra

Dear Madam Zahra,

In COMSOL, can convert pascal to voltage?

Dear Sorokhaibam Nilakanta Meitei

The pascal (symbol: Pa) is the SI derived unit of pressure used to quantify internal pressure, stress, Young's modulus and ultimate tensile strength. It is defined as one newton per square metre.

1 Pa= 1 N/m^2 = 1 kg/m.s^2 =1 J/m^3

While one volt is defined as the difference in electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. It is also equal to the potential difference between two parallel, infinite planes spaced 1 meter apart that create an electric field of 1 newton per coulomb. Additionally, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units (m, kg, s, and A) as

V= potential energy/charge = J/s = kg.m^2/A.s^3

so I think we can say 1 Pa=1 V.A.s/m^3

(Reference: Wikipedia)

Thank you very much madam Zahra for your kind information.

Your welcome Sorokhaibam Nilakanta Meitei

In COMSOL Multiphysics you can mix and match units too (as long as they describe the scale/physical phenomenon/... of course). 1[m] + 1[cm] for example is no problem; 1.01 [m]. Also, even if the input box question asks for N or whatever, you can override that by inputting 1[kN] instead of inputting 1,000 with unit [N] or without unit at all. It is an extremely nice tool for unit check btw.