Water at 0°C is contained in a spherical container of radius R, with a thin wall made up of a highly conducting material. It is exposed to a temperature -T°C which remains constant throughout. Determine an expression which relates time taken by the entire water to freeze with the density of water (p), thermal conductivity of ice (K) , radius of the sphere and latent heat of fusion of ice (L).
Answers
Answer:
Explanation:
.. Thereby, the main aim targeted here is to provide an improved model that accounts for supercooling, convection and the modified enthalpy-temperature curve. To carry out this work, we consider the thermal lattice Boltzmann method (TLBM) [15][16][17][18][19][20] based on a partial bounce-back (PBB) approach [21][22][23][24] supplemented with an enthalpy-based model. This enhanced model provides a more accurate simulation of phasechange materials, can better predict the solidification and melting processes, and thus match the experimental results. ...
... The Lattice Boltzmann method (LBM) is a mesoscale discrete model that has become an increasingly popular tool for simulating fluid flows with and without heat transfers [15][16][17][18][19][20]. It consists of simulating the statistical behavior of a set of particles on a lattice with finite velocities. ...
... eq c pl oct (17) where R c , R pl , and R oct , are respectively the thermal resistivity contact, resistance of Plexiglas and Octadecane. We first neglect the thermal contact resistivity.
Answer:
Explanation:
According to Newton’s universal law of gravitation,
We have F ∝ M1M2……1
F ∝ 1/d2
Combining I and 2 we get F ∝ M1 M2/d2