Heat release at the wetting front during capillary filling of cellulosic micro-substrates

Crystallization of urea from an evaporative aqueous solution sessile droplet at sub-boiling temperatures and surfaces with different wettability

“…12(i). Similar temperature spikes were also observed at the wetting front during spontaneous imbibition [65,66], and evidently, they also dominate the interface of a solidification front. The time difference between the two thermal peaks of points A and B is about 200 ms which is the duration in order for the crystals to spread around the perimeter of the droplet.…”

In Situ Tracking of Wetting‐Front Transient Heat Release on a Surface‐Mounted Metal–Organic Framework

“…However, the temperature rise at the CFP wetting front is relatively small (<4 K) and non‐selective in the context of translating into potential sensing devices. [ 10,14,15 ] This is largely because of two factors: weak water adsorption capacity and the lack of modularity in the CFP architecture. [ 15,16 ] Hydrophilic porous MOFs with tailored architecture could potentially show a high water adsorption capacity based on either chemisorption and physisorption, each process inflicting a temperature increase when fabricating them as thin films.…”

“…[11,15] The capillary force induced by interfacial energy differences and electrostatic attractions that occur at the dry-wet crossover region are the key contributing factors. [11][12][13][14] Such capillary-driven spontaneous water imbibition studies indicate that the transient heat produced by adsorption and chemical interactions can be monitored by the simple use of thermometers. However, the temperature rise at the CFP wetting front is relatively small (<4 K) and non-selective in the context of translating into potential sensing devices.…”

“…However, the temperature rise at the CFP wetting front is relatively small (<4 K) and non-selective in the context of translating into potential sensing devices. [10,14,15] This is largely because of two factors: weak water adsorption capacity and the lack of modularity in Transient heat generation during guest adsorption and host-guest interactions is a natural phenomenon in metal-organic framework (MOF) chemistry. However, in situ tracking of such MOF released heat is an insufficiently researched field due to the fast heat dissipation to the surroundings.…”

A (Dual) Network Model for Heat Transfer in Porous Media

“…Evaporation of water from soils locally decreases the soil surface's temperature (Shahraeeni and Or 2010), an effect also used for turbine blade cooling (Dahmen et al 2014). Spontaneous imbibition may feature local temperature spikes on the order of several Kelvin due to surface chemistry interaction between the fluid and the solid phase (Terzis et al 2017). Heat transfer in porous media also plays a crucial role in single-fluid-phase systems: In the face of global climate change, geothermal energy (Scheck-Wenderoth et al 2013;Praditia et al 2018) may become an essential contributor of clean and sustainable energy.…”