Added thermal conductivity

test/unit_test/runtime/fmt_units_test.cpp

@@ -268,6 +268,12 @@ TEST_CASE("fmt::format on synthesized unit symbols", "[text][fmt]")
     CHECK(fmt::format("{:%Q %Aq}", 1q_J_per_kg_K) == "1 J K^-1 kg^-1");
   }
 
+  SECTION("thermal conductivity")
+  {
+    CHECK(fmt::format("{}", 1q_W_per_m_K) == "1 W ⋅ m⁻¹ ⋅ K⁻¹");
+    CHECK(fmt::format("{:%Q %Aq}", 1q_W_per_m_K) == "1 W m^-1 K^-1");
+  }
+
   SECTION("incoherent units with powers")
   {
     CHECK(fmt::format("{}", 1q_mi * 1q_mi * 1q_mi) == "1 [15900351812136/3814697265625 × 10⁹] m³");

test/unit_test/static/si_test.cpp

@@ -322,4 +322,9 @@ static_assert(1q_J_per_K * 1q_K == 1q_s * 1q_N * 1q_m_per_s);
 static_assert(detail::unit_text<dim_heat_capacity, joule_per_kelvin>() == "J/K");
 static_assert(detail::unit_text<dim_specific_heat_capacity, joule_per_kilogram_kelvin>() == basic_symbol_text("J ⋅ K⁻¹ ⋅ kg⁻¹", "J kg^-1 K^-1"));
 
+// thermal conductivity
+
+static_assert(20q_W_per_m_K * 10q_m * 300q_K == 60'000q_W);
+static_assert(detail::unit_text<dim_thermal_conductivity, watt_per_metre_kelvin>() == basic_symbol_text("W ⋅ m⁻¹ ⋅ K⁻¹", "W m^-1 K^-1"));
+
 }  // namespace