What is the value of the volumetric expansion coefficient of Lauric acid for modelling natural convection?

Dear Jenne,

You may look up this article by Wang and Meng - Article Fatty acid eutectic/polymethyl methacrylate composite as for...

Hope it is helpful.

Thank You very much Arun K Raj

In the paper you suggested, they mentioned the volume expansion coefficient of eutectic mixture of capric acid and lauric acid.

But I want to know the value for pure Lauric acid.

Thank you

Julian Vogel

Dear Sunku prasad Jenne ,

do you mean the volumetric expansion from solid to liquid, which is about 6 %, or the thermal expansion coefficient in the liquid, which is about 0.0005 1/K?

I calculated the thermal expansion coefficient of Lauric Acid (Dodecanoic Acid) using the density given in:

https://www.sciencedirect.com/science/article/abs/pii/S1359431113000057

Other material properties may be found in:

Article A review of materials, heat transfer and phase change proble...

Article Performance evaluation of fatty acids as phase change materi...

Hope this helps and best regards,

Julian

Sunku prasad Jenne

Thank you Julian Vogel

I am looking for thermal expansion coefficient in the the liquid.

Thank you very much for the value.

Can you please give me an idea how you calculated thermal expansion coefficient value (beta)?

Julian Vogel

You're welcome.

I used a mean value of the density close to the melting point as constant Boussinesq density and the density gradient in the liquid close to the melting point temperature. It is described in this paper for another material (page 5, equation 4):

Article Validation of a numerical model with a benchmark Experiment ...

There, rho_bar is the mean value of the density, e.g. (rho_liq(T_m)+rho_sol(T_m))/2 and the gradient of rho_liq is evaluated from two points in the liquid, e.g. (rho_liq(T_m+10 K)-rho_liq(T_m))/(10 K).

Best regards, Julian

Sunku prasad Jenne

Thank you very much sir Julian Vogel

Sunku prasad Jenne

Thank you very much for your answers Julian Vogel and Arun K Raj

I found the value to be 0.0008 1/K from the following references.

https://asmedigitalcollection.asme.org/HT/proceedings-abstract/HT2016/50336/V002T08A007/243570

Conference Paper Geometrical Impacts on Phase Change Heat Transfer Modeling

Arun K Raj

Sunku prasad Jenne Thank you for sharing the findings. Much appreciated.

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